this could be an "utility method" itself

[todo]

consider to create in VgaTerminal class an operator/method to implement the same functionality here. Probably, not just the same if want to keep the fine element level checks like below.

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sdl2-vga-terminal/sdl2-vga-terminal/test/VgaTerminalTest.cpp

Lines 11 to 16 in 71399ec

	// TODO this could be an "utility method" itself
	// BODY consider to create in VgaTerminal class
	// BODY an operator/method to implement the same functionality here.
	// BODY Probably, not just the same if want to keep the fine element level checks like below.
	void cmpViewportCheck(const SDL_Rect& vp, const SDL_Rect& exp)
	{

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This issue was generated by todo based on a TODO comment in 71399ec when #158 was merged. cc @Raffaello.