C++: Extend getFunction to handle orphaned local variables

cpp/ql/lib/semmle/code/cpp/Variable.qll

@@ -398,6 +398,8 @@ class LocalVariable extends LocalScopeVariable, @localvariable {
     exists(DeclStmt s | s.getADeclaration() = this and s.getEnclosingFunction() = result)
     or
     exists(ConditionDeclExpr e | e.getVariable() = this and e.getEnclosingFunction() = result)
+    or
+    orphaned_variables(underlyingElement(this), unresolveElement(result))
   }
 }