Adding of _t to (u)int types, and WChar to char32_t

See: eaae0bb5e

src/date_gui.cpp

@@ -61,7 +61,7 @@ struct SetDateWindow : Window {
 		this->date.year = Clamp(this->date.year, min_year, max_year);
 	}
 
-	Point OnInitialPosition(int16 sm_width, int16 sm_height, int window_number) override
+	Point OnInitialPosition(int16_t sm_width, int16_t sm_height, int window_number) override
 	{
 		Point pt = { this->parent->left + this->parent->width / 2 - sm_width / 2, this->parent->top + this->parent->height / 2 - sm_height / 2 };
 		return pt;