Cast a macro argument to `int` to fix a Clang error. #974

Job	Run time
windows (windows-latest, Visual Studio 17 2022, v143, x64, NO, Debug,Release, ON, ON, OpenGL+Vulk...	24m 16s
windows (windows-latest, Visual Studio 17 2022, v143, x64, NO, Release, OFF, OFF, OFF, OFF, OFF, ...	5m 49s
windows (windows-latest, Visual Studio 17 2022, v143, x64, NO, Release, OFF, OFF, OFF, OFF, OFF, ...	5m 50s
windows (windows-latest, Visual Studio 17 2022, v143, x64, NO, Release, OFF, OFF, OFF, OFF, OFF, ...	5m 33s
windows (windows-latest, Visual Studio 17 2022, CLangCL, x64, NO, Debug,Release, ON, ON, OpenGL+V...	32m 0s
windows (windows-latest, Visual Studio 17 2022, CLangCL, x64, NO, Release, OFF, OFF, OFF, OFF, OF...	6m 2s
windows (windows-latest, Visual Studio 17 2022, CLangCL, x64, NO, Release, OFF, OFF, OFF, OFF, OF...	7m 18s
windows (windows-latest, Visual Studio 17 2022, CLangCL, x64, NO, Release, OFF, OFF, OFF, OFF, OF...	6m 19s
windows (windows-2019, Visual Studio 16 2019, v142, x64, Debug,Release, ON, ON, OpenGL+Vulkan, ON...	26m 32s
windows (windows-latest, Visual Studio 17 2022, CLangCL, arm64, Debug,Release, ON, ON, OpenGL+Vul...	25m 38s
	2h 25m 17s

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