h265parse: update parser state and header flag when using fallback sps

When sps parsing fails we use a fallback sps from the caps, since we
have got an sps we need to update parser state and header as in the case the
sps was successfully parsed

gst/videoparsers/gsth265parse.c

@@ -727,6 +727,8 @@ gst_h265_parse_process_nal (GstH265Parse * h265parse, GstH265NalUnit * nalu)
         pres = gst_h265_parser_parse_sps (nalparser, nalu, &sps, FALSE);
         if (pres != GST_H265_PARSER_OK) {
           GST_WARNING_OBJECT (h265parse, "failed to parse SPS:");
+          h265parse->state |= GST_H265_PARSE_STATE_GOT_SPS;
+          h265parse->header |= TRUE;
           return FALSE;
         }
         GST_WARNING_OBJECT (h265parse,