### 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
FunctionNode *parent_function = nullptr;
					{
						BlockNode *block = p_block;
						while (block && !block->parent_function) {
							block = block->parent_block;
						}
						parent_function = block->parent_function;
					}
					if (parent_function) {
						StringName func_name = parent_function->name;
						if (!used_local_vars.has(func_name)) {
							used_local_vars.insert(func_name, HashMap<StringName, Usage>());
						}
						used_local_vars[func_name].insert(name, Usage(tk_line));
					}
				}
#endif 
				is_const_decl = is_const;
				BlockNode::Variable var;
				var.type = type;
				var.precision = precision;
				var.line = tk_line;
				var.array_size = array_size;
				var.is_const = is_const;
				var.struct_name = struct_name;
				tk = _get_token();
				if (tk.type == TK_BRACKET_OPEN) {
					Error error = _parse_array_size(p_block, p_function_info, false, &decl.size_expression, &var.array_size, &unknown_size);
					if (error != OK) {
						return error;