when we create a new account, plugin.windows[account] doesn't exists

src/config.py

@@ -913,7 +913,12 @@ class Account_modification_window:
 	'''Class for account informations'''
 	def on_account_modification_window_destroy(self, widget):
 		'''close window'''
-		del self.plugin.windows[self.account]['account_modification']
+		if self.plugin.windows.has_key(self.account):
+			if self.plugin.windows[self.account].has_key('account_modification')
+				del self.plugin.windows[self.account]['account_modification']
+				return
+		if self.plugin.windows.has_key('account_modification'):
+			del self.plugin.windows['account_modification']
 	
 	def on_cancel_button_clicked(self, widget):
 		self.window.destroy()

src/roster_window.py

@@ -533,10 +533,10 @@ class Roster_window:
 		menu.reposition()
 
 	def on_edit_account(self, widget, account):
-		if self.plugin.windows.has_key('account_modification'):
-			self.plugin.windows['account_modification'].window.present()
+		if self.plugin.windows[account].has_key('account_modification'):
+			self.plugin.windows[account]['account_modification'].window.present()
 		else:
-			self.plugin.windows['account_modification'] = \
+			self.plugin.windows[account]['account_modification'] = \
 				config.Account_modification_window(self.plugin, account)
 
 	def mk_menu_account(self, event, iter):