Short circuit default initialization of array elements

Implement remaining TODO from bug 543038 where we already checked default init
of array element and worst cost will no longer change.

Author: i-garrison

core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/AggregateInitialization.java

@@ -167,6 +167,12 @@ private Cost checkInitializationOfElements(IType type, Cost worstCost) throws DO
 						if (cost.compareTo(worstCost) > 0) {
 							worstCost = cost;
 						}
+
+						if (fIndex > fInitializers.length) {
+							// Already checked default-initialization, short-circuit now
+							// as worst cost will no longer change
+							break;
+						}
 					}
 				}
 			}