[clang] [Clang][Sema] Fix missing warning when comparing mismatched enums in … (PR #81418)

[Erich Keane via cfe-commits]

================
@@ -263,6 +263,14 @@ namespace {
   }
 }
 
+QualType Expr::getEnumCoercedType(const ASTContext &Ctx) const {
+  if (isa<EnumType>(this->getType()))
+    return this->getType();
+  else if (const EnumConstantDecl *ECD = this->getEnumConstantDecl())
----------------
erichkeane wrote:

```suggestion
  else if (const auto *ECD = this->getEnumConstantDecl())
```

https://github.com/llvm/llvm-project/pull/81418