Fix /W3 warnings in examples

examples/audio/03-load-wav/load-wav.c

@@ -80,7 +80,7 @@ int SDL_AppIterate(void *appstate)
        We're being lazy here, but if there's less than the entire wav file left to play,
        just shove a whole copy of it into the queue, so we always have _tons_ of
        data queued for playback. */
-    if (SDL_GetAudioStreamAvailable(stream) < wav_data_len) {
+    if (SDL_GetAudioStreamAvailable(stream) < (int)wav_data_len) {
         /* feed more data to the stream. It will queue at the end, and trickle out as the hardware needs more data. */
         SDL_PutAudioStreamData(stream, wav_data, wav_data_len);
     }

examples/game/01-snake/main.c

@@ -72,8 +72,8 @@ static int handle_key_event_(SnakeContext *ctx, SDL_Scancode key_code)
 
 static void set_rect_xy_(SDL_FRect *r, short x, short y)
 {
-    r->x = x * SNAKE_BLOCK_SIZE_IN_PIXELS;
-    r->y = y * SNAKE_BLOCK_SIZE_IN_PIXELS;
+    r->x = (float)(x * SNAKE_BLOCK_SIZE_IN_PIXELS);
+    r->y = (float)(y * SNAKE_BLOCK_SIZE_IN_PIXELS);
 }
 
 int SDL_AppIterate(void *appstate)