Follow up to bug 307056. Now that we are not trying to edit ldap cards, return the correct error code. r/sr=bienvenu

mailnews/addrbook/src/nsAbLDAPCard.cpp

@@ -48,10 +48,7 @@ nsAbLDAPCard::~nsAbLDAPCard()
 
 NS_IMETHODIMP nsAbLDAPCard::EditCardToDatabase(const char *aURI)
 {
-  // do nothing, you can't edit LDAP cards.
-  // XXX we shouldn't be getting here, but we are because
-  // the UI doesn't disable in this case.  fix this later.
-  return NS_OK;
+  return NS_ERROR_NOT_IMPLEMENTED;
 }