### Godot version

4.0.3

### System information

Win7

### Issue description

![image](https://github.com/godotengine/godot/assets/28286958/abec9d3c-e078-424c-9430-d9fe8897aad6)


### Steps to reproduce

1. Create shader
2. Add uint with hex, e.g. 0xffffu

### Minimal reproduction project

N/A
do_block = alloc_node<BlockNode>();
				do_block->parent_block = p_block;
				Error err = _parse_block(do_block, p_function_info, true, true, true);
				if (err) {
					return err;
				}
				tk = _get_token();
				if (tk.type != TK_CF_WHILE) {
					_set_expected_after_error("while", "do");
					return ERR_PARSE_ERROR;
				}
			}
			tk = _get_token();
			if (tk.type != TK_PARENTHESIS_OPEN) {
				_set_expected_after_error("(", "while");
				return ERR_PARSE_ERROR;
			}
			ControlFlowNode *cf = alloc_node<ControlFlowNode>();
			if (is_do) {
				cf->flow_op = FLOW_OP_DO;
			} else {
				cf->flow_op = FLOW_OP_WHILE;
			}
			Node *n = _parse_and_reduce_expression(p_block, p_function_info);
			if (!n) {
				return ERR_PARSE_ERROR;
			}
			tk = _get_token();
			if (tk.type != TK_PARENTHESIS_CLOSE) {
				_set_expected_error(")");