Update cpp/ql/src/Likely Bugs/Leap Year/UncheckedLeapYearAfterYearModification.ql

Co-authored-by: Mathias Vorreiter Pedersen <mathiasvp@github.com>

Author: bdrodes

cpp/ql/src/Likely Bugs/Leap Year/UncheckedLeapYearAfterYearModification.ql

@@ -273,7 +273,10 @@ class IgnorablePointerOrCharArithmetic extends IgnorableOperation {
  */
 predicate isOperationSourceCandidate(Expr e) {
   not e instanceof IgnorableOperation and
-  not e.getEnclosingFunction() instanceof IgnorableFunction and
+  exists(Function f |
+    f = e.getEnclosingFunction() and
+    not f instanceof IgnorableFunction
+  )
   (
     e instanceof SubExpr
     or