Fix problems detected by CodeQL static analysis #651

Job	Run time
gn (Debug)	2m 13s
linux-32 (gcc, g++, Debug, ubuntu-20.04)	2m 26s
gn (Release)	2m 16s
linux-32-no-asm	1s
linux-32 (gcc, g++, Debug, ubuntu-22.04)	2m 26s
linux (gcc, g++, Debug, ubuntu-20.04)	2m 26s
linux-32 (gcc, g++, Release, ubuntu-20.04)	2m 22s
linux (gcc, g++, Debug, ubuntu-22.04)	2m 26s
linux-no-asm	2m 22s
linux-32 (gcc, g++, Release, ubuntu-22.04)	2m 24s
linux (gcc, g++, Release, ubuntu-20.04)	2m 26s
mac (Debug, macos-11, BUILD_STATIC_LOADER=OFF)	2m 22s
linux-32 (clang, clang++, Debug, ubuntu-20.04)	2m 25s
linux (gcc, g++, Release, ubuntu-22.04)	2m 24s
mac (Debug, macos-latest, BUILD_STATIC_LOADER=OFF)	1s
mac-no-asm (BUILD_STATIC_LOADER=ON)	1s
linux-32 (clang, clang++, Debug, ubuntu-22.04)	2m 23s
linux (clang, clang++, Debug, ubuntu-20.04)	2m 25s
mac (Release, macos-11, BUILD_STATIC_LOADER=ON)	1s
mac-no-asm (BUILD_STATIC_LOADER=OFF)	1s
linux-32 (clang, clang++, Release, ubuntu-20.04)	2m 25s
linux (clang, clang++, Debug, ubuntu-22.04)	2m 14s
mac (Release, macos-11, BUILD_STATIC_LOADER=OFF)	1s
linux-32 (clang, clang++, Release, ubuntu-22.04)	2m 22s
linux (clang, clang++, Release, ubuntu-20.04)	2m 26s
mac (Release, macos-latest, BUILD_STATIC_LOADER=OFF)	1s
mingw-no-asm	1s
linux (clang, clang++, Release, ubuntu-22.04)	2m 24s
windows_clang_cl (x64, Release)	1s
windows_ninja (Win32, Debug)	1s
windows_vs (Win32, Debug)	1s
windows_ninja (x64, Release)	1s
windows_vs-no-asm (Win32)	1s
windows_vs (Win32, Release)	1s
windows_vs-no-asm (x64)	1s
windows_vs (x64, Debug)	1s
windows_vs (x64, Release)	1s
	47m 54s

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