AllCommands: simplify the tokenizer loop

src/command/AllCommands.cxx

@@ -384,25 +384,27 @@ command_process(Client &client, unsigned num, char *line)
 
 	/* now parse the arguments (quoted or unquoted) */
 
-	while (argc < COMMAND_ARGV_MAX &&
-	       (argv[argc] =
-		tokenizer.NextParam(error)) != nullptr)
-		++argc;
-
-	/* some error checks */
-
-	if (argc >= COMMAND_ARGV_MAX) {
-		command_error(client, ACK_ERROR_ARG, "Too many arguments");
+	while (true) {
+		if (argc == COMMAND_ARGV_MAX) {
+			command_error(client, ACK_ERROR_ARG,
+				      "Too many arguments");
 			current_command = nullptr;
 			return CommandResult::ERROR;
 		}
 
-	if (!tokenizer.IsEnd()) {
+		char *a = tokenizer.NextParam(error);
+		if (a == nullptr) {
+			if (tokenizer.IsEnd())
+				break;
+
 			command_error(client, ACK_ERROR_ARG, "%s", error.GetMessage());
 			current_command = nullptr;
 			return CommandResult::ERROR;
 		}
 
+		argv[argc++] = a;
+	}
+
 	/* look up and invoke the command handler */
 
 	const struct command *cmd =