dix: make CopyGrab() static

This function is only called once in the same source file, no external callers
at all. So, it doesn't need to be visible outside that file, and we can allow
the compiler to do whatever fancy optimizations it might wanna do.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
(cherry picked from commit 93856053b7)

dix/grabs.c

@@ -188,6 +188,8 @@ UngrabAllDevices(Bool kill_client)
     ErrorF("End list of ungrabbed devices\n");
 }
 
+static Bool CopyGrab(GrabPtr dst, const GrabPtr src);
+
 GrabPtr
 AllocGrab(const GrabPtr src)
 {
@@ -264,7 +266,7 @@ FreeGrab(GrabPtr pGrab)
     free(pGrab);
 }
 
-Bool
+static Bool
 CopyGrab(GrabPtr dst, const GrabPtr src)
 {
     Mask *mdetails_mask = NULL;

include/dixgrabs.h

@@ -33,7 +33,6 @@ extern void UngrabAllDevices(Bool kill_client);
 
 extern GrabPtr AllocGrab(const GrabPtr src);
 extern void FreeGrab(GrabPtr grab);
-extern Bool CopyGrab(GrabPtr dst, const GrabPtr src);
 
 extern GrabPtr CreateGrab(int /* client */ ,
                           DeviceIntPtr /* device */ ,