### 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
for (int j = 0; j < shader->functions.size(); j++) {
								if (shader->functions[j].name == current_function) {
									shader->functions.write[j].uses_function.insert(name);
									break;
								}
							}
							
							function_index = i;
							break;
						}
					}
					if (carg >= 0) {
						completion_type = COMPLETION_CALL_ARGUMENTS;
						completion_line = tk_line;
						completion_block = p_block;
						completion_function = funcname->name;
						completion_argument = carg;
					}
					if (!ok) {
						return nullptr;
					}
					bool is_custom_func = false;
					if (!_validate_function_call(p_block, p_function_info, func, &func->return_cache, &func->struct_name, &is_custom_func)) {
						_set_error(vformat(RTR("No matching function found for: '%s'."), String(funcname->name)));
						return nullptr;
					}
					completion_class = TAG_GLOBAL; 
					if (function_index >= 0) {