updae source to 2.0.9 source

Edward Rudd

2019-04-09 9cd2e9ec8fc0127393dfce9c0359d500c8c238be

 source/test/testwm2.c

@@ -146,6 +146,9 @@
        quit(2);
    }

    SDL_EventState(SDL_DROPFILE, SDL_ENABLE);
    SDL_EventState(SDL_DROPTEXT, SDL_ENABLE);

    for (i = 0; i < state->num_windows; ++i) {
        SDL_Renderer *renderer = state->renderers[i];
        SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF);