RULE-17-5: Avoid deprecated predicate

Author: lcartey

c/misra/src/rules/RULE-17-5/ArrayFunctionArgumentNumberOfElements.ql

@@ -42,7 +42,7 @@ class ArrayParameter extends Parameter {
  * int arr2[2] = {1, 2, 3};
  * ```
  */
-int countElements(ArrayAggregateLiteral l) { result = count(l.getElementExpr(_)) }
+int countElements(ArrayAggregateLiteral l) { result = count(l.getAnElementExpr(_)) }
 
 class SmallArrayConfig extends DataFlow::Configuration {
   SmallArrayConfig() { this = "SmallArrayConfig" }