prototype-dictionary.diff

diff -r f3c987fb99b9 src/eval.c
--- a/src/eval.c	Tue Jan 12 21:31:21 2010 +0100
+++ b/src/eval.c	Fri Jan 15 18:46:28 2010 +0900
@@ -5334,6 +5334,9 @@
 		}
 		{
 		    dictitem_T	*item;
+		    dict_T	*dict;
+		    dictitem_T	*proto;
+		    int		deep = 100;
 
 		    if (len == -1)
 		    {
@@ -5347,7 +5350,16 @@
 			}
 		    }
 
-		    item = dict_find(rettv->vval.v_dict, key, (int)len);
+		    dict = rettv->vval.v_dict;
+		    item = dict_find(dict, key, (int)len);
+
+		    while (0 < --deep && item == NULL
+			    && (proto = dict_find(dict, "prototype", -1)) != NULL
+			    && proto->di_tv.v_type == VAR_DICT)
+		    {
+			dict = proto->di_tv.vval.v_dict;
+			item = dict_find(dict, key, (int)len);
+		    }
 
 		    if (item == NULL && verbose)
 			EMSG2(_(e_dictkey), key);