Restructure #ifs to be clearer, also ensures that we return from the thread

proc instead of calling exit() on __MINGW32__.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@30754 b3059339-0415-0410-9bf9-f77b7e298cf2

stream/cache2.c

@@ -430,12 +430,12 @@ static void ThreadProc( void *s ){
   } while (cache_execute_control(s));
 #if defined(__MINGW32__) || defined(__OS2__)
   _endthread();
-#endif
-#ifdef PTHREAD_CACHE
+#elif defined(PTHREAD_CACHE)
   return NULL;
-#endif
+#else
   // make sure forked code never leaves this function
   exit(0);
+#endif
 }
 
 int cache_stream_fill_buffer(stream_t *s){