Sleep a bit less in thread

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401117

src/audio/mint/SDL_mintaudio.c

@@ -174,7 +174,7 @@ int SDL_MintAudio_Thread(long param)
 			}
 		}
 
-		usleep(1000);
+		usleep(100);
 	}
 	SDL_MintAudio_thread_finished = SDL_TRUE;
 	return 0;