stream_file: explicitly signal EOF

Explicitly signal EOF when reaching the end of a file/pipe.

Fixes a 4 second delay due to stream_reconnect for e.g.
echo | mplayer -

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@35112 b3059339-0415-0410-9bf9-f77b7e298cf2

stream/stream_file.c

@@ -55,6 +55,8 @@ static const struct m_struct_st stream_opts = {
 
 static int fill_buffer(stream_t *s, char* buffer, int max_len){
   int r = read(s->fd,buffer,max_len);
+  // We are certain this is EOF, do not retry
+  if (max_len && r == 0) s->eof = 1;
   return (r <= 0) ? -1 : r;
 }