Add checks for zombie sourcecode problems #2591

Job	Run time
macos-x86_64	48s
linux-x86_64-autotools	1m 53s
linux-x86_64	1m 28s
linux (i386, i686, i686-linux-gnu, i386-linux-gnu)	1m 23s
macos-x86_64_autotools	53s
linux (armhf, armhf, arm-linux-gnueabihf, arm-linux-gnueabihf)	1m 11s
mingw (mingw64, x86_64)	3m 33s
linux (arm64, aarch64, aarch64-linux-gnu, aarch64-linux-gnu)	1m 17s
mingw (ucrt64, ucrt-x86_64)	3m 30s
msvc (x86, Win32)	1m 14s
mingw (clang64, clang-x86_64)	3m 24s
msvc (x64, x64)	1m 33s
msvc (arm64, ARM64)	1m 46s
	23m 53s

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