Unnecessary tests in Control_Bar_System

[xezon]

WindowMsgHandledType Control_Bar_System(GameWindow *window, unsigned int message, unsigned int data_1, unsigned int data_2)
{
...
                while (str != nullptr && *str != '\0') {
                    msg->Append_Wide_Char_Arg(*str);
                    str++;
                }

Can be

WindowMsgHandledType Control_Bar_System(GameWindow *window, unsigned int message, unsigned int data_1, unsigned int data_2)
{
...
                if (str != nullptr)
                  while (*str != '\0') {
                    msg->Append_Wide_Char_Arg(*str);
                    str++;
                  }