Created windows must be destroyed at CommonQuit().

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%404039

test/common.c

@@ -1022,6 +1022,12 @@ CommonQuit(CommonState * state)
         SDL_AudioQuit();
     }
     if (state->windows) {
+        int it;
+
+        for (it=0; it<state->num_windows; it++)
+        {
+           SDL_DestroyWindow(state->windows[it]);
+        }
         SDL_free(state->windows);
     }
     SDL_free(state);