gtk2 security and bug fix update

[2.10.4-29]

• Improve patch to parse CUPS user lpoptions file to avoid crashes
  on s390 and ia64
  Resolves: #603809

[2.10.4-28]

• Fix the filechooser not opening selected file when location entry
  is empty
  Resolves: #518483

[2.10.4-27]

• Fix integer overflow in GdkPixbuf’s XBM image file format loader
  (CVE-2012-2370)
  Resolves: #846252

[2.10.4-26]

• Fix crash when drag and dropping notebook tabs
  Resolves: #830901

[2.10.4-25]

• Fix a problem with Wacom tablets pen event positions when using dual
  head displays
  Resolves: #743658

[2.10.4-24]

• Backport a patch to parse CUPS user lpoptions file.
  Resolves: #603809