as a precaution, make sure that the buffer isn't used again after resetting

git-svn-id: https://vgmstream.svn.sourceforge.net/svnroot/vgmstream@288 51a99a44-fe44-0410-b1ba-c3e57ba2b86b

src/vgmstream.c

@@ -154,6 +154,7 @@ void reset_vgmstream(VGMSTREAM * vgmstream) {
         /* input_offset is ignored as we can assume it will be 0 for a seek
          * to sample 0 */
         mpg123_feedseek(data->m,0,SEEK_SET,&input_offset);
+        data->buffer_full = data->buffer_used = 0;
     }
 #endif
 }