Show a real error box when unable to bind to port

Fixes #1941.

src/common/socks5.py

@@ -32,6 +32,7 @@ import os
 import struct
 import sha
 import time
+from dialogs import BindPortError
 
 from errno import EWOULDBLOCK
 from errno import ENOBUFS
@@ -84,12 +85,9 @@ class SocksQueue:
 			self.listener.bind()
 			if self.listener.started is False:
 				self.listener = None
-				import sys
-				print >> sys.stderr, '================================================='
-				print >> sys.stderr, 'Unable to bind to port %s.' % port
-				print >> sys.stderr, 'Maybe you have another running instance of Gajim.'
-				print >> sys.stderr, 'File Transfer will be canceled.'
-				print >> sys.stderr, '================================================='
+				# We cannot bind port, call error 
+				# dialog from dialogs.py and fail
+				BindPortError(port)
 				return None
 			self.connected += 1
 		return self.listener

src/dialogs.py

@@ -731,6 +731,12 @@ class FileChooserDialog(gtk.FileChooserDialog):
 	def just_destroy(self, widget):
 		self.destroy()
 
+class BindPortError(HigDialog):
+	def __init__(self, port):
+		ErrorDialog(_('Unable to bind to port %s.' % port),
+			_('Maybe you have another running instance of Gajim. '
+			'File Transfer will be canceled.'))
+
 class ConfirmationDialog(HigDialog):
 	'''HIG compliant confirmation dialog.'''
 	def __init__(self, pritext, sectext='', on_response_ok = None,