Remove superfluous if(p!=NULL) checks around free(p); p=NULL;

This patch has been generated by the following Coccinelle semantic patch:

@@
expression E;
@@
-  if (E != NULL) {
-   free(E);
(
-   E = NULL;
|
-   E = 0;
)
-  }
+ free(E);
+ E = NULL;

Signed-off-by: Cyril Brulebois <kibi@debian.org>
Reviewed-by: Mikhail Gusarov <dottedmag@dottedmag.net>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

dix/ptrveloc.c

@@ -952,11 +952,9 @@ SetAccelerationProfile(
     if(profile == NULL && profile_num != PROFILE_UNINITIALIZE)
 	return FALSE;
 
-    if(vel->profile_private != NULL){
     /* Here one could free old profile-private data */
     free(vel->profile_private);
     vel->profile_private = NULL;
-    }
     /* Here one could init profile-private data */
     vel->Profile = profile;
     vel->statistics.profile_number = profile_num;

hw/kdrive/fake/fake.c

@@ -215,11 +215,8 @@ fakeUnmapFramebuffer (KdScreenInfo *screen)
 {
     FakePriv		*priv = screen->card->driver;
     KdShadowFbFree (screen);
-    if (priv->base)
-    {
     free(priv->base);
-	priv->base = 0;
+    priv->base = NULL;
-    }
     return TRUE;
 }
 

hw/xwin/wincmap.c

@@ -516,11 +516,8 @@ winGetPaletteDD (ScreenPtr pScreen, ColormapPtr pcmap)
   pScreen->blackPixel = 0;
 
   /* Free colormap */
-  if (ppeColors != NULL)
-    {
   free(ppeColors);
   ppeColors = NULL;
-    }
 
   /* Free the DC */
   if (hdc != NULL)

hw/xwin/winpixmap.c

@@ -163,11 +163,8 @@ winDestroyPixmapNativeGDI (PixmapPtr pPixmap)
   if (pPixmapPriv->hBitmap) DeleteObject (pPixmapPriv->hBitmap);
   
   /* Free the bitmap info header memory */
-  if (pPixmapPriv->pbmih != NULL)
-    {
   free(pPixmapPriv->pbmih);
   pPixmapPriv->pbmih = NULL;
-    }
 
   /* Free the pixmap memory */
   free (pPixmap);

miext/rootless/rootlessWindow.c

@@ -1140,10 +1140,8 @@ FinishFrameResize(WindowPtr pWin, Bool gravity, int oldX, int oldY,
         }
     }
 
-    if (gResizeDeathBits != NULL) {
     free(gResizeDeathBits);
     gResizeDeathBits = NULL;
-    }
 
     if (gravity) {
         pScreen->CopyWindow = gResizeOldCopyWindowProc;

render/miindex.c

@@ -321,17 +321,11 @@ miInitIndexed (ScreenPtr	pScreen,
 void
 miCloseIndexed (ScreenPtr	pScreen,
 		PictFormatPtr	pFormat)
-{
-    if (pFormat->index.devPrivate)
 {
     free(pFormat->index.devPrivate);
-	pFormat->index.devPrivate = 0;
+    pFormat->index.devPrivate = NULL;
-    }
-    if (pFormat->index.pValues)
-    {
     free(pFormat->index.pValues);
-	pFormat->index.pValues = 0;
+    pFormat->index.pValues = NULL;
-    }
 }
 
 void

render/picture.c

@@ -1390,12 +1390,9 @@ SetPictureTransform (PicturePtr	    pPicture,
 	*pPicture->transform = *transform;
     }
     else
-    {
-	if (pPicture->transform)
     {
 	free(pPicture->transform);
-	    pPicture->transform = 0;
+	pPicture->transform = NULL;
-	}
     }
     pPicture->serialNumber |= GC_CHANGE_SERIAL_BIT;
 

xkb/XKBAlloc.c

@@ -212,13 +212,11 @@ XkbNamesPtr	names;
 	    register XkbKeyTypePtr	type;
 	    type= map->types;
 	    for (i=0;i<map->num_types;i++,type++) {
-		if (type->level_names!=NULL) {
 		free(type->level_names);
 		type->level_names = NULL;
 	    }
 	}
     }
-    }
     if ((which&XkbKeyNamesMask)&&(names->keys!=NULL)) {
 	free(names->keys);
 	names->keys= NULL;

xkb/XKBGAlloc.c

@@ -50,10 +50,8 @@ _XkbFreeGeomLeafElems(	Bool			freeAll,
 {
     if ((freeAll)||(*elems==NULL)) {
 	*num_inout= *sz_inout= 0;
-	if (*elems!=NULL) {
 	free(*elems);
 	*elems = NULL;
-	}	
 	return;
     }
 
@@ -373,23 +371,17 @@ XkbDoodadPtr	doodad= (XkbDoodadPtr)doodad_in;
     switch (doodad->any.type) {
    	case XkbTextDoodad: 
 	    {
-		if (doodad->text.text!=NULL) {
 		free(doodad->text.text);
 		doodad->text.text = NULL;
-		}
-		if (doodad->text.font!=NULL) {
 		free(doodad->text.font);
 		doodad->text.font = NULL;
 	    }
-	    }
 	    break;
    	case XkbLogoDoodad: 
 	    {
-		if (doodad->logo.logo_name!=NULL) {
 		free(doodad->logo.logo_name);
 		doodad->logo.logo_name = NULL;
 	    }
-	    }
 	    break;
     }
     return;
@@ -434,10 +426,8 @@ XkbFreeGeometry(XkbGeometryPtr geom,unsigned which,Bool freeMap)
     if ((which&XkbGeomKeyAliasesMask)&&(geom->key_aliases!=NULL))
 	XkbFreeGeomKeyAliases(geom,0,geom->num_key_aliases,TRUE);
     if (freeMap) {
-	if (geom->label_font!=NULL) {
 	free(geom->label_font);
 	geom->label_font = NULL;
-	}
 	free(geom);
     }
     return;

xkb/XKBMAlloc.c

@@ -321,7 +321,7 @@ KeyCode		matchingKeys[XkbMaxKeyCount],nMatchingKeys;
 		return BadAlloc;
 	    }
 	}
-	else if (type->preserve!=NULL) {
+	else {
 	    free(type->preserve);
 	    type->preserve = NULL;
 	}
@@ -807,31 +807,23 @@ XkbClientMapPtr	map;
 		register int 	i;
 		XkbKeyTypePtr	type;
 		for (i=0,type=map->types;i<map->num_types;i++,type++) {
-		    if (type->map!=NULL) {
 		    free(type->map);
 		    type->map = NULL;
-		    }
-		    if (type->preserve!=NULL) {
 		    free(type->preserve);
 		    type->preserve = NULL;
-		    }
 		    type->map_count= 0;
-		    if (type->level_names!=NULL) {
 		    free(type->level_names);
 		    type->level_names = NULL;
 		}
 	    }
-	    }
 	    free(map->types);
 	    map->num_types= map->size_types= 0;
 	    map->types= NULL;
 	}
     }
     if (what&XkbKeySymsMask) {
-	if (map->key_sym_map!=NULL) {
 	free(map->key_sym_map);
 	map->key_sym_map = NULL;
-	}
 	if (map->syms!=NULL) {
 	    free(map->syms);
 	    map->size_syms= map->num_syms= 0;
@@ -864,10 +856,8 @@ XkbServerMapPtr	map;
 	map->explicit= NULL;
     }
     if (what&XkbKeyActionsMask) {
-	if (map->key_acts!=NULL) {
 	free(map->key_acts);
 	map->key_acts = NULL;
-	}
 	if (map->acts!=NULL) {
 	    free(map->acts);
 	    map->num_acts= map->size_acts= 0;