Fix compiler warning: parse_dlf_buffer needs to return 0 on success

Simply running off the end of a non-void function isn't nice.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

parse-xml.c

@@ -2586,6 +2586,7 @@ int parse_dlf_buffer(char *buffer, size_t size)
 		ptr += 16;
 	}
 	dive_end();
+	return 0;
 }