Xext: renaming shadowing variable

xvdisp.c: In function 'ProcXvStopVideo':
xvdisp.c:712:11: warning: declaration of 'rc' shadows a previous local
[-Wshadow]
xvdisp.c:705:17: warning: shadowed declaration is here [-Wshadow]
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Mark Kettenis <kettenis@openbsd.org>

Xext/xvdisp.c

@@ -702,7 +702,7 @@ ProcXvUngrabPort(ClientPtr client)
 static int
 ProcXvStopVideo(ClientPtr client)
 {
-    int status, rc;
+    int status, ret;
     DrawablePtr pDraw;
     XvPortPtr pPort;
 
@@ -716,9 +716,9 @@ ProcXvStopVideo(ClientPtr client)
         return status;
     }
 
-    rc = dixLookupDrawable(&pDraw, stuff->drawable, client, 0, DixWriteAccess);
-    if (rc != Success)
-        return rc;
+    ret = dixLookupDrawable(&pDraw, stuff->drawable, client, 0, DixWriteAccess);
+    if (ret != Success)
+        return ret;
 
     return XvdiStopVideo(client, pPort, pDraw);
 }