remmina hangs after error dialog "Browsing for service type _rfb._tcp in domain 192.168.178.30 failed: DNS failure: NXDOMAIN" was displayed

Steps to reproduce:

  1. create a new VNC connection and click the "Browse the network to find a VNC server" button
  2. Add the domain 192.168.178.30 (or something convenient for you network) and start the search
  3. a dialog with a label "Browsing for service type _rfb._tcp in domain 192.168.178.30 failed: DNS failure: NXDOMAIN" and a close button pops up
  4. press the close button and `remmina` won't return/freeze

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: remmina 1.1.1-1ubuntu1
Uname: Linux 4.0.1-040001-generic x86_64
ApportVersion: 2.17.2-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Mon May 4 00:53:27 2015
EcryptfsInUse: Yes
InstallationDate: Installed on 2015-04-02 (31 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Beta amd64 (20150326)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: remmina
SystemImageInfo:
 current build number: 0
 device name:
 channel: daily
 last update: Unknown
UpgradeStatus: No upgrade log present (probably fresh install)