Make arguments of av_set_pts_info() unsigned.

Fixes issue1240/mpeg1/smclockmpeg1.avi.3.1

Originally committed as revision 19319 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/avformat.h

@@ -963,7 +963,7 @@ AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base,
  * @param pts_den denominator to convert to seconds (MPEG: 90000)
  */
 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
-                     int pts_num, int pts_den);
+                     unsigned int pts_num, unsigned int pts_den);
 
 #define AVSEEK_FLAG_BACKWARD 1 ///< seek backward
 #define AVSEEK_FLAG_BYTE     2 ///< seeking based on position in bytes

libavformat/utils.c

@@ -3304,7 +3304,7 @@ char *ff_data_to_hex(char *buff, const uint8_t *src, int s)
 }
 
 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
-                     int pts_num, int pts_den)
+                     unsigned int pts_num, unsigned int pts_den)
 {
     unsigned int gcd= av_gcd(pts_num, pts_den);
     s->pts_wrap_bits = pts_wrap_bits;