use size_t

When dealing with in-memory lengths, the standard type "size_t" should
be used.  Missing one can be quite dangerous, because an attacker
could provoke an integer under-/overflow, which may provide an attack
vector.

git-svn-id: https://svn.musicpd.org/mpd/trunk@7205 09075e82-0dd4-0310-85a5-a0d7c8717e4f

src/outputBuffer.h

@@ -58,7 +58,7 @@ int sendDataToOutputBuffer(OutputBuffer * cb,
 			   DecoderControl * dc,
 			   int seekable,
 			   void *data,
-			   long datalen,
+			   size_t datalen,
 			   float time,
 			   mpd_uint16 bitRate, ReplayGainInfo * replayGainInfo);