EXA/mixed: Don't consider devKind for detecting dimension change.

Fixes http://bugs.freedesktop.org/show_bug.cgi?id=25536 .

There should be no reason for the pitch to actually change when none of the
other dimensions do, and this could lead to incorrectly freeing the system
memory copy when allocating a GPU copy, resulting in loss of valid pixmap
contents.

Signed-off-by: Michel Dänzer <daenzer@vmware.com>
Acked-by: Maarten Maathuis <madman2003@gmail.com>
Signed-off-by: Keith Packard <keithp@keithp.com>

exa/exa_mixed.c

@@ -155,7 +155,6 @@ exaModifyPixmapHeader_mixed(PixmapPtr pPixmap, int width, int height, int depth,
 
     if (width != pPixmap->drawable.width ||
 	height != pPixmap->drawable.height ||
-	devKind != pPixmap->devKind ||
 	depth != pPixmap->drawable.depth ||
 	bitsPerPixel != pPixmap->drawable.bitsPerPixel) {
 	if (pExaPixmap->driverPriv) {