output/osx: remove sleep call from render callback

Blocking inside the render callback is forbidden, and this sleep call
didn't make any sense.

NEWS

@@ -2,6 +2,7 @@ ver 0.16.7 (2011/??/??)
 * output:
   - httpd: fix excessive buffering
   - openal: force 16 bit playback, as 8 bit doesn't work
+  - osx: remove sleep call from render callback
 * fix moving after current song
 
 

src/output/osx_plugin.c

@@ -142,10 +142,6 @@ osx_render(void *vdata,
 
 	buffer->mDataByteSize = buffer_size;
 
-	if (!buffer_size) {
-		g_usleep(1000);
-	}
-
 	return 0;
 }