Require that variables are initialized

[ChrisThrasher]

Description

This new automated check is a good step towards systematically eliminating uninitialized reads. The only weird part was that I had to add some NOLINTs to Objecive-C++ code due to clang-tidy not entirely understanding Objective-C loops.

[coveralls]

Pull Request Test Coverage Report for Build 8858286583

Details

• 82 of 162 (50.62%) changed or added relevant lines in 30 files are covered.
• 5 unchanged lines in 4 files lost coverage.
• Overall coverage decreased (-0.02%) to 51.601%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/SFML/Audio/AudioDevice.cpp	0	1	0.0%
src/SFML/Network/Http.cpp	1	2	50.0%
src/SFML/Network/TcpSocket.cpp	1	2	50.0%
src/SFML/Window/DRM/InputImpl.cpp	0	1	0.0%
src/SFML/Window/Win32/WglContext.cpp	0	1	0.0%
src/SFML/Window/macOS/JoystickImpl.cpp	0	1	0.0%
src/SFML/Audio/SoundRecorder.cpp	0	2	0.0%
src/SFML/Window/Unix/JoystickImpl.cpp	1	3	33.33%
src/SFML/Window/Win32/WindowImplWin32.cpp	0	2	0.0%
src/SFML/Window/macOS/InputImpl.mm	0	2	0.0%

Files with Coverage Reduction	New Missed Lines	%
src/SFML/Window/DRM/DRMContext.cpp	1	0.0%
src/SFML/Audio/MiniaudioUtils.cpp	1	0.0%
src/SFML/Window/Win32/JoystickImpl.cpp	1	10.36%
src/SFML/Window/Unix/WindowImplX11.cpp	2	42.5%

Totals
Change from base Build 8841003784:	-0.02%
Covered Lines:	10435
Relevant Lines:	19108

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💛 - Coveralls