avformat/dvdvideodec: check return code of ff_dvdclut_yuv_to_rgb()

Signed-off-by: Marth64 <marth64@proxyid.net>
(cherry picked from commit e256761def)

libavformat/dvdvideodec.c

@@ -1299,6 +1299,7 @@ static int dvdvideo_subp_stream_analyze(AVFormatContext *s, uint32_t offset, sub
 {
     DVDVideoDemuxContext *c = s->priv_data;
 
+    int ret;
     char lang_dvd[3] = {0};
 
     entry->startcode = 0x20 + (offset & 0x1F);
@@ -1310,7 +1311,9 @@ static int dvdvideo_subp_stream_analyze(AVFormatContext *s, uint32_t offset, sub
 
     /* dvdsub palettes currently have no colorspace tagging and all muxers only support RGB */
     /* this is not a lossless conversion, but no use cases are supported for the original YUV */
-    ff_dvdclut_yuv_to_rgb(entry->clut, FF_DVDCLUT_CLUT_SIZE);
+    ret = ff_dvdclut_yuv_to_rgb(entry->clut, FF_DVDCLUT_CLUT_SIZE);
+    if (ret < 0)
+        return ret;
 
     AV_WB16(lang_dvd, subp_attr.lang_code);
     entry->lang_iso = ff_convert_lang_to(lang_dvd, AV_LANG_ISO639_2_BIBL);