(mkt_remove_entry): realloc can return NULL on success in the case 0

entries are allocated, From Andrew Bartlet


git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@16352 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/krb5/keytab_memory.c

@@ -215,7 +215,7 @@ mkt_remove_entry(krb5_context context,
 	return KRB5_KT_NOTFOUND;
     }
     e = realloc(d->entries, d->num_entries * sizeof(*d->entries));
-    if(e != NULL)
+    if(e != NULL || d->num_entries == 0)
 	d->entries = e;
     return 0;
 }