Merge pull request github#479 from jketema/extensionals

Use database extensionals instead of their wrapper classes in two predicates

Author: jketema

cpp/common/src/codingstandards/cpp/enhancements/ControlFlowGraphEnhancements.qll

@@ -10,8 +10,8 @@ import cpp
  * should be in this relation.
  */
 pragma[noinline]
-private predicate isFunction(Element el) {
-  el instanceof Function
+private predicate isFunction(@element el) {
+  el instanceof @function
   or
   el.(Expr).getParent() = el
 }
@@ -22,7 +22,7 @@ private predicate isFunction(Element el) {
  */
 pragma[noopt]
 private predicate callHasNoTarget(@funbindexpr fc) {
-  exists(Function f |
+  exists(@function f |
     funbind(fc, f) and
     not isFunction(f)
   )