hls: Fix vod

Don't stop when playing a vod file without bandwidth information

When a playlist doesn't contains any bandwidth stream or information,
initialize stream->bandwidth to 0 (it's a unsigned number). So test will
not
fail when calculating if we have the time to download it.
 >> uint64_t size = (segment->duration * hls->bandwidth);
 >> int estimated = (int)(size / s->p_sys->bandwidth);
 >> if (estimated > segment->duration)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>
(cherry picked from commit 9ffcb9c5)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/stream_filter/httplive.c

@@ -1957,7 +1957,7 @@ static int Open(vlc_object_t *p_this)
     vlc_UrlParse(&p_sys->m3u8, psz_uri, 0);
     free(psz_uri);
 
-    p_sys->bandwidth = -1;
+    p_sys->bandwidth = 0;
     p_sys->b_live = true;
     p_sys->b_meta = false;
     p_sys->b_error = false;