url_fskip: Return an error code if the url_fseek failed

Originally committed as revision 24277 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/avio.h

@@ -358,8 +358,9 @@ int64_t url_fseek(ByteIOContext *s, int64_t offset, int whence);
 /**
  * Skip given number of bytes forward.
  * @param offset number of bytes
+ * @return 0 on success, <0 on error
  */
-void url_fskip(ByteIOContext *s, int64_t offset);
+int url_fskip(ByteIOContext *s, int64_t offset);
 
 /**
  * ftell() equivalent for ByteIOContext.

libavformat/aviobuf.c

@@ -182,9 +182,10 @@ int64_t url_fseek(ByteIOContext *s, int64_t offset, int whence)
     return offset;
 }
 
-void url_fskip(ByteIOContext *s, int64_t offset)
+int url_fskip(ByteIOContext *s, int64_t offset)
 {
-    url_fseek(s, offset, SEEK_CUR);
+    int64_t ret = url_fseek(s, offset, SEEK_CUR);
+    return ret < 0 ? ret : 0;
 }
 
 int64_t url_ftell(ByteIOContext *s)