dvbsuboverlay: Make the new dvb_subtitles_free() accept NULL

Don't crash if dvb_subtitles_free(NULL) gets passed, like most other
*_free functions are happy with.

diff --git a/gst/dvbsuboverlay/dvb-sub.c b/gst/dvbsuboverlay/dvb-sub.c
index 2df0297..4c28ddd 100644 (file)
--- a/gst/dvbsuboverlay/dvb-sub.c
+++ b/gst/dvbsuboverlay/dvb-sub.c
@@ -1371,6 +1371,9 @@ dvb_subtitles_free (DVBSubtitles * sub)
   int i;
   DVBSubtitleRect *rect;
 
+  if (sub == NULL)
+    return;
+
   /* Now free up all the temporary memory we allocated */
   for (i = 0; i < sub->num_rects; ++i) {
     rect = sub->rects[i];