Fixed compiler warning (gcc w/ -Wall) for unused variable, and checked for

 error return code too.

--HG--
branch : SDL-1.2
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/branches/SDL-1.2%402435

src/video/x11/SDL_x11video.c

@@ -538,11 +538,20 @@ static void create_aux_windows(_THIS)
 				   whenever we re-create an IC.  */
 				unsigned long mask = 0;
 				char *ret = pXGetICValues(SDL_IC, XNFilterEvents, &mask, NULL);
+				if (ret != NULL) {
+					XUnsetICFocus(SDL_IC);
+					XDestroyIC(SDL_IC);
+					SDL_IC = NULL;
+					SDL_SetError("no input context could be created");
+					XCloseIM(SDL_IM);
+					SDL_IM = NULL;
+				} else {
 					XSelectInput(SDL_Display, WMwindow, app_event_mask | mask);
 					XSetICFocus(SDL_IC);
 				}
 			}
 		}
+	}
 	#endif
 
 	/* Allow the window to be deleted by the window manager */