MdePkg: CodeQL Fixes. #247

Job	Run time
Analyze (ArmPkg, IA32,X64)	4m 31s
Analyze (CryptoPkg, IA32)	16m 33s
Analyze (CryptoPkg, X64)	16m 8s
Analyze (DynamicTablesPkg, IA32,X64)	7m 25s
Analyze (FatPkg, IA32,X64)	7m 4s
Analyze (FmpDevicePkg, IA32,X64)	12m 54s
Analyze (IntelFsp2Pkg, IA32,X64)	10m 18s
Analyze (IntelFsp2WrapperPkg, IA32,X64)	10m 22s
Analyze (MdeModulePkg, IA32)	16m 13s
Analyze (MdeModulePkg, X64)	12m 51s
Analyze (MdePkg, IA32,X64)	9m 18s
Analyze (PcAtChipsetPkg, IA32,X64)	9m 55s
Analyze (PrmPkg, IA32,X64)	7m 55s
Analyze (SecurityPkg, IA32,X64)	13m 14s
Analyze (ShellPkg, IA32,X64)	13m 18s
Analyze (SourceLevelDebugPkg, IA32,X64)	10m 54s
Analyze (StandaloneMmPkg, IA32,X64)	9m 47s
Analyze (UefiCpuPkg, IA32,X64)	12m 37s
Analyze (UnitTestFrameworkPkg, IA32,X64)	10m 21s
	3h 31m 38s

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