DatabaseCommands: fix crash on "list base"

src/command/DatabaseCommands.cxx

@@ -173,17 +173,12 @@ handle_list(Client &client, int argc, char *argv[])
 {
 	unsigned tagType = locate_parse_type(argv[1]);
 
-	if (tagType == TAG_NUM_OF_ITEM_TYPES) {
+	if (tagType >= TAG_NUM_OF_ITEM_TYPES &&
+	    tagType != LOCATE_TAG_FILE_TYPE) {
 		command_error(client, ACK_ERROR_ARG, "\"%s\" is not known", argv[1]);
 		return CommandResult::ERROR;
 	}
 
-	if (tagType == LOCATE_TAG_ANY_TYPE) {
-		command_error(client, ACK_ERROR_ARG,
-			      "\"any\" is not a valid return tag type");
-		return CommandResult::ERROR;
-	}
-
 	SongFilter *filter;
 	if (argc == 3) {
 		/* for compatibility with < 0.12.0 */

src/db/DatabasePrint.cxx

@@ -261,6 +261,8 @@ listAllUniqueTags(Client &client, unsigned type,
 					 std::ref(client), _1);
 		return db->Visit(selection, f, error);
 	} else {
+		assert(type < TAG_NUM_OF_ITEM_TYPES);
+
 		using namespace std::placeholders;
 		const auto f = std::bind(PrintUniqueTag, std::ref(client),
 					 (TagType)type, _1);