epg: epg_episode_number_format - ensure to return null string, fixes #2907

diff --git a/src/epg.c b/src/epg.c
index 9db12180106318aa29b4572be210d8d2e3b02013..0889880c2e8a779e7e3f88b1a90c8439fb4b303f 100644 (file)
--- a/src/epg.c
+++ b/src/epg.c
@@ -1103,6 +1103,7 @@ size_t epg_episode_number_format
   if (!episode || !buf || !len) return 0;
   epg_episode_num_t num;
   epg_episode_get_epnum(episode, &num);
+  buf[0] = '\0';
   if ( num.e_num ) {
     if (pre) tvh_strlcatf(buf, len, i, "%s", pre);
     if ( sfmt && num.s_num ) {