undoing what was almost certainly a correct bug fix.

This bug fix is not needed by ajc, and making the change to the jdt.core
code will make future synchronization more difficult.

org.eclipse.jdt.core/eval/org/eclipse/jdt/internal/eval/CodeSnippetSkeleton.java

@@ -55,7 +55,7 @@ public class CodeSnippetSkeleton implements IBinaryType, EvaluationConstants {
 			this.selector = selector;
 			this.methodDescriptor = methodDescriptor;
 			this.exceptionTypeNames = exceptionTypeNames;
-			this.isConstructor = isConstructor;
+			this.isConstructor = this.isConstructor;
 		}
 		
 		public char[][] getExceptionTypeNames() {