[clang] [analyzer] Fix note for member reference (PR #68691)

[via cfe-commits]

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@@ -157,26 +169,43 @@ const Expr *bugreporter::getDerefExpr(const Stmt *S) {
   return E;
 }
 
+static const VarDecl *getVarDeclForExpression(const Expr *E) {
+  if (const auto *DR = dyn_cast<DeclRefExpr>(E))
+    return dyn_cast<VarDecl>(DR->getDecl());
+  return nullptr;
+}
+
 static const MemRegion *
 getLocationRegionIfReference(const Expr *E, const ExplodedNode *N,
                              bool LookingForReference = true) {
-  if (const auto *DR = dyn_cast<DeclRefExpr>(E)) {
-    if (const auto *VD = dyn_cast<VarDecl>(DR->getDecl())) {
-      if (LookingForReference && !VD->getType()->isReferenceType())
-        return nullptr;
-      return N->getState()
-          ->getLValue(VD, N->getLocationContext())
-          .getAsRegion();
+  if (const auto *ME = dyn_cast<MemberExpr>(E)) {
+    // This handles other kinds of null references,
+    // for example, references from FieldRegions:
----------------
DonatNagyE wrote:

```suggestion
    // This handles null references from FieldRegions, for example:
```
After moving this comment here, the "other" was left dangling.

https://github.com/llvm/llvm-project/pull/68691