Don't quit testffmpeg when alt-tabbing away

test/testffmpeg.c

@@ -1144,7 +1144,8 @@ int main(int argc, char *argv[])
 
         /* Check for events */
         while (SDL_PollEvent(&event)) {
-            if (event.type == SDL_EVENT_QUIT || event.type == SDL_EVENT_KEY_DOWN) {
+            if (event.type == SDL_EVENT_QUIT ||
+                (event.type == SDL_EVENT_KEY_DOWN && event.key.keysym.sym == SDLK_ESCAPE)) {
                 done = 1;
             }
         }