### 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
Node *n = _parse_and_reduce_expression(p_block, p_function_info);
					if (!n) {
						return ERR_PARSE_ERROR;
					}
					if (is_const && n->type == Node::NODE_TYPE_OPERATOR && static_cast<OperatorNode *>(n)->op == OP_CALL) {
						OperatorNode *op = static_cast<OperatorNode *>(n);
						for (int i = 1; i < op->arguments.size(); i++) {
							if (!_check_node_constness(op->arguments[i])) {
								_set_error(vformat(RTR("Expected constant expression for argument %d of function call after '='."), i - 1));
								return ERR_PARSE_ERROR;
							}
						}
					}
					if (n->type == Node::NODE_TYPE_CONSTANT) {
						ConstantNode *const_node = static_cast<ConstantNode *>(n);
						if (const_node && const_node->values.size() == 1) {
							var.value = const_node->values[0];
						}
					}
					if (!_compare_datatypes(var.type, var.struct_name, var.array_size, n->get_datatype(), n->get_datatype_name(), n->get_array_size())) {
						return ERR_PARSE_ERROR;
					}
					decl.initializer.push_back(n);
					tk = _get_token();
				} else {
					if (is_const) {
						_set_error(RTR("Expected initialization of constant."));
						return ERR_PARSE_ERROR;
					}
				}