[analyzer] Updated comments to reflect D85817

[RedDocMD]

Summary

Changed DeclaratorDecl in comment to NamedDecl

[vsavchenko]

Thanks for doing that!
I have a minor nit-picking comment, it is preferable to use present-tense imperative-style commit messages, i.e. "Update comment...".

[RedDocMD]

In D95846#2536380, @vsavchenko wrote:

Thanks for doing that!
I have a minor nit-picking comment, it is preferable to use present-tense imperative-style commit messages, i.e. "Update comment...".

Noted. I will do that in future.

clang/include/clang/StaticAnalyzer/Core/PathSensitive/SVals.h

private:
   }
 };
 
 /// Value representing pointer-to-member.
 ///
 /// This value is qualified as NonLoc because neither loading nor storing
 /// operations are applied to it. Instead, the analyzer uses the L-value coming
 /// from pointer-to-member applied to an object.
-/// This SVal is represented by a DeclaratorDecl which can be a member function
-/// pointer or a member data pointer and a list of CXXBaseSpecifiers. This list
-/// is required to accumulate the pointer-to-member cast history to figure out
-/// the correct subobject field. In particular, implicit casts grow this list
-/// and explicit casts like static_cast shrink this list.
+/// This SVal is represented by a NamedDecl which can be a member function
+/// pointer or a member data pointer and an optional list of CXXBaseSpecifiers.
+/// This list is required to accumulate the pointer-to-member cast history to
+/// figure out the correct subobject field. In particular, implicit casts grow
+/// this list and explicit casts like static_cast shrink this list.
 class PointerToMember : public NonLoc {
   friend class ento::SValBuilder;
 
 public:
   using PTMDataType =
       llvm::PointerUnion<const NamedDecl *, const PointerToMemberData *>;
 
   const PTMDataType getPTMData() const {