SDL: logging message box information

jni/SDL2-2.0.1/src/video/SDL_video.c

@@ -3189,6 +3189,12 @@ SDL_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonid)
         X11_ShowMessageBox(messageboxdata, buttonid) == 0) {
         retval = 0;
     }
+#endif
+#if __ANDROID__
+    if (retval == -1) {
+        SDL_Log ("SDL_ShowMessageBox[%s]: %s", messageboxdata->title, messageboxdata->message);
+        retval = 0;
+    }
 #endif
     if (retval == -1) {
         SDL_SetError("No message system available");