rm: Use the correct codec_data_size signedness

The function takes a size and not an offset.

CC: libav-stable@libav.org
Sample-Id: rm_deadlock.rm
Signed-off-by: NLuca Barbato <lu_zero@gentoo.org>

libavformat/rdt.c

@@ -132,7 +132,7 @@ static int
 rdt_load_mdpr (PayloadContext *rdt, AVStream *st, int rule_nr)
 {
     AVIOContext pb;
-    int size;
+    unsigned int size;
     uint32_t tag;
 
     /**

libavformat/rm.h

@@ -50,7 +50,7 @@ extern AVInputFormat ff_rdt_demuxer;
  */
 int ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVIOContext *pb,
                                AVStream *st, RMStream *rst,
-                               int codec_data_size);
+                               unsigned int codec_data_size);
 
 /**
  * Parse one rm-stream packet from the input bytestream.

libavformat/rmdec.c

@@ -282,9 +282,9 @@ static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
     return 0;
 }
 
-int
-ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVIOContext *pb,
-                           AVStream *st, RMStream *rst, int codec_data_size)
+int ff_rm_read_mdpr_codecdata(AVFormatContext *s, AVIOContext *pb,
+                              AVStream *st, RMStream *rst,
+                              unsigned int codec_data_size)
 {
     unsigned int v;
     int size;