COMMON: fix module callback error

Author: Chris Warren-Smith

src/common/var.c

@@ -529,6 +529,7 @@ void v_set(var_t *dest, const var_t *src) {
     break;
   case V_FUNC:
     dest->v.fn.cb = src->v.fn.cb;
+    dest->v.fn.mcb = src->v.fn.mcb;
     dest->v.fn.id = src->v.fn.id;
     break;
   case V_NIL:

src/common/var_eval.c

@@ -57,6 +57,8 @@ void v_eval_func(var_p_t self, var_p_t v_func, var_p_t result) {
         } else {
           err_throw("Undefined");
         }
+      } else if (v_is_type(result, V_MAP)) {
+        map_set_lib_id(result, self->v.m.lib_id);
       }
     }
     if (ptable) {