[Clang] Silence warning when building with MSVC 2022

Previously, the warning seen:

[22/95] Building CXX object tools\clang\lib\StaticAnalyzer\Checker...bj.clangStaticAnalyzerCheckers.dir\NoReturnFunctionChecker.cpp.objC:\git\llvm-project\clang\lib\StaticAnalyzer\Checkers\NoReturnFunctionChecker.cpp(149): warning C4305: 'if': truncation from 'size_t' to 'bool'
C:\git\llvm-project\clang\include\clang/Analysis/SelectorExtras.h(28): note: see reference to function template instantiation 'clang::Selector clang::getKeywordSelector<const char,const char,const char,const char>(clang::ASTContext &,const char *,const char *,const char *,const char *)' being compiled
C:\git\llvm-project\clang\lib\StaticAnalyzer\Checkers\NoReturnFunctionChecker.cpp(125): note: see reference to function template instantiation 'void clang::lazyInitKeywordSelector<const char,const char,const char,const char>(clang::Selector &,clang::ASTContext &,const char *,const char *,const char *,const char *)' being compiled