Fix suggested by Bob

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%403767

src/video/x11/SDL_x11render.c

@@ -359,7 +359,7 @@ X11_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
                     shm_error = False;
                     X_handler = XSetErrorHandler(shm_errhandler);
                     XShmAttach(renderdata->display, shminfo);
-                    XSync(renderdata->display, True);
+                    XSync(renderdata->display, False);
                     XSetErrorHandler(X_handler);
                     if (shm_error) {
                         shmdt(shminfo->shmaddr);