show correct error message when we fail to create an account. See #1725

src/common/connection.py

@@ -168,8 +168,8 @@ class Connection(ConnectionHandlers):
 					req['username'] = self.new_account_info['name']
 					req['password'] = self.new_account_info['password']
 					def _on_register_result(result):
-						if not result:
-							self.dispatch('ACC_NOT_OK', (self.connection.lastErr))
+						if not common.xmpp.isResultNode(result):
+							self.dispatch('ACC_NOT_OK', (result.getError()))
 							return
 						self.connected = 0
 						self.password = self.new_account_info['password']

src/common/xmpp/features_nb.py

@@ -149,7 +149,7 @@ def register(disp, host, info, cb):
 		info=info.asDict()
 	for i in info.keys(): 
 		iq.setTag('query').setTagData(i,info[i])
-	_on_default_response(disp, iq, cb)
+	disp.SendAndCallForResponse(iq, cb)
 
 def unregister(disp, host, cb):
 	""" Unregisters with host (permanently removes account).