dix: unexport and document EventSelectForWindow()

Not used by any external drivers, and not supposed to be used by them,
so no need to keep it in public API.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>

dix/dix_priv.h

@@ -277,4 +277,15 @@ Bool MaybeDeliverEventToClient(WindowPtr pWindow,
                                ClientPtr skipClient)
     _X_ATTRIBUTE_NONNULL_ARG(1,2);
 
+/*
+ * @brief select window events to listen on
+ *
+ * @param pWindow   window to listen on
+ * @param pClient   the client that's listening on the events
+ * @param mask      mask of events to listen on
+ * @return X error code
+ */
+XRetCode EventSelectForWindow(WindowPtr pWindow, ClientPtr pClient, Mask mask)
+    _X_ATTRIBUTE_NONNULL_ARG(1,2);
+
 #endif /* _XSERVER_DIX_PRIV_H */

dix/events.c

@@ -4536,8 +4536,7 @@ OtherClientGone(void *value, XID id)
     FatalError("client not on event list");
 }
 
-int
-EventSelectForWindow(WindowPtr pWin, ClientPtr client, Mask mask)
+XRetCode EventSelectForWindow(WindowPtr pWin, ClientPtr client, Mask mask)
 {
     Mask check;
     OtherClients *others;

include/dixevents.h

@@ -26,10 +26,6 @@ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 #ifndef DIXEVENTS_H
 #define DIXEVENTS_H
 
-extern _X_EXPORT int EventSelectForWindow(WindowPtr /* pWin */ ,
-                                          ClientPtr /* client */ ,
-                                          Mask /* mask */ );
-
 extern _X_EXPORT int EventSuppressForWindow(WindowPtr /* pWin */ ,
                                             ClientPtr /* client */ ,
                                             Mask /* mask */ ,