clear contact list when we connect. fixes #3234

src/common/contacts.py

@@ -202,6 +202,9 @@ class Contacts:
 		if len(self._contacts[account][contact.jid]) == 0:
 			del self._contacts[account][contact.jid]
 
+	def clear_contacts(self, account):
+		self._contacts[account] = {}
+
 	def remove_jid(self, account, jid):
 		'''Removes all contacts for a given jid'''
 		if not self._contacts.has_key(account):

src/roster_window.py

@@ -1223,6 +1223,8 @@ class RosterWindow:
 			gajim.contacts.add_account(account)
 		if not gajim.groups.has_key(account):
 			gajim.groups[account] = {}
+		# Empty contact list
+		gajim.contacts.clear_contacts(account)
 		for jid in array.keys():
 			jids = jid.split('/')
 			#get jid