Log Message:
Update gtk-vnc to 0.5.2.

Feb 22, 2013: Release 0.5.2
===========================

Removed features:

 o Browser plugin is deleted, since it was unmaintained.
   Recommend that people use a pure HTML5 impl like noVNC
   to avoid security problems inherant in native plugins.

Bug fixes:

 o Misc fixes to RPM specfiles
 o Update translations
 o Fix big-endian support in cairo framebuffer
 o Avoid out of bounds accessing arrays
 o Fix win32 quote key mapping
 o Fix NULL dereference in logging code
 o Fix OOM check in python bindings
 o Avoid array overrun in colourmap mode
 o Fix buffer space check when sending data
 o Add introspection annotation for vnc_display_send_keys
 o Fix pulseaudio enablement in demo
 o Avoid crash with unsupported audio formats
 o Turn off deprecation warnings
 o Convert VncConnectionCredential to VncDisplayCredential
 o Add API to allow access to keysyms from introspected bindings