[clang] [C] Warn on uninitialized const objects (PR #137166)

[Erich Keane via cfe-commits]

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@@ -6496,6 +6496,17 @@ static bool canPerformArrayCopy(const InitializedEntity &Entity) {
   return false;
 }
 
+static const FieldDecl *GetConstField(const RecordDecl *RD) {
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erichkeane wrote:

Ah, just `assert(!LangOpts.CPlusPlus)` would be enough, but just `assert(!isa<CXXRecordDecl>(RD))` is as well (since all recorddecls in C++ mode are CXXRecordDecl)

https://github.com/llvm/llvm-project/pull/137166