hls: Fixing a deadlock introduced in previous commit.

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>
(cherry picked from commit 75fbc4d4b792f5e4b40d6257ce1d6daaa810cc2f)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/stream_filter/httplive.c

@@ -1397,10 +1397,10 @@ static int hls_UpdatePlaylist(stream_t *s, hls_stream_t *hls_new, hls_stream_t *
                 }
                 free(segment->psz_key_path);
                 segment->psz_key_path = p->psz_key_path ? strdup(p->psz_key_path) : NULL;
-                vlc_mutex_unlock(&segment->lock);
                 segment_Free(p);
                 free(psz_url);
             }
+            vlc_mutex_unlock(&segment->lock);
         }
         else
         {