Merge pull request #315 from barakugav/immutable-sublist-iter

Immutable sub list iterator bug fix, ensureIndex is relative to sub range

drv/ImmutableList.drv

@@ -543,7 +543,7 @@ public class IMMUTABLE_LIST KEY_GENERIC extends LISTS.ImmutableListBase KEY_GENE
 
 		@Override
 		public KEY_LIST_ITERATOR KEY_GENERIC listIterator(final int index) {
-			ensureRestrictedIndex(index + from);
+			ensureIndex(index);
 
 			return new KEY_LIST_ITERATOR KEY_GENERIC() {
 					int pos = index + from;