### 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
completion_class = TAG_GLOBAL;
	completion_struct = StringName();
	completion_base = TYPE_VOID;
	completion_base_array = false;
	include_positions.clear();
	include_positions.push_back(FilePosition());
#ifdef DEBUG_ENABLED
	keyword_completion_context = CF_UNSPECIFIED;
	used_constants.clear();
	used_varyings.clear();
	used_uniforms.clear();
	used_functions.clear();
	used_structs.clear();
	used_local_vars.clear();
	warnings.clear();
#endif 
	error_line = 0;
	tk_line = 1;
	char_idx = 0;
	error_set = false;
	error_str = "";
	is_const_decl = false;
	while (nodes) {
		Node *n = nodes;
		nodes = nodes->next;
		memdelete(n);
	}
}
#ifdef DEBUG_ENABLED
void ShaderLanguage::_parse_used_identifier(const StringName &p_identifier, IdentifierType p_type, const StringName &p_function) {