Update _insert functions to update

iterators as per new specification.

m-array.h

@@ -755,6 +755,7 @@
   {                                                                     \
     assert (it != NULL && a == it->array);                              \
     M_C(name, _push_at)(a, it->index + 1, x);                           \
+    it->index ++;                                                       \
   }                                                                     \
   , /* End of INIT_SET */ )                                             \
                                                                         \

m-i-list.h

@@ -481,6 +481,7 @@ typedef struct ilist_head_s {
     M_CALL_INIT_SET(oplist, *p, x);					\
     type *obj = M_C(name, _ref)(it);					\
     M_C(name, _push_after)(obj, p);					\
+    it->current = p;  \
     (void) list;							\
     ILISTI_CONTRACT(name, list);					\
   }									\

m-list.h

@@ -472,6 +472,8 @@
       next->next = current->next;                                       \
       current->next = next;                                             \
     }                                                                   \
+    /* Update insertion_point to this element */                        \
+    insertion_point->current = next;                                    \
     LISTI_CONTRACT(list);                                               \
   }                                                                     \
                                                                         \