Build fails on Ubuntu Lucid with gtk 2.20.1 (> r11420)

[su_v]

As reported on irc by pippijn (and logged for cafuego's PPA), current trunk fails to build on Lucid with Gtk 2.20.1:

|14:07| < pippijn> there are exactly 2 problems
|14:07| < pippijn> one is src/widgets/desktop-widget.cpp with GSEAL
|14:08| < pippijn> and one is src/measure-context.cpp with GDK_KEY_Shift_L and R

1) introduced in 11421/11422 [1]:
  CXX widgets/desktop-widget.o
widgets/desktop-widget.cpp: In member function 'bool SPDesktopWidget::shutdown()':
widgets/desktop-widget.cpp:968: error: 'struct _GtkMessageDialog' has no member named 'label'
widgets/desktop-widget.cpp:1031: error: 'struct _GtkMessageDialog' has no member named 'label'
make[4]: *** [widgets/desktop-widget.o] Error 1

2) was probably introduced in r11459 (missing include of 'src/compat-key-syms.h' ?)

[1] <https://launchpadlibrarian.net/106243678/buildlog_ubuntu-lucid-amd64.inkscape_0.49~devel%2B11422%2B7~lucid1_FAILEDTOBUILD.txt.gz>

[su_v (suv-lp)]

Issue 2 (in src/measure-context.cpp with GDK_KEY_Shift_L and R) was addressed in r11463:
<http://bazaar.launchpad.net/~inkscape.dev/inkscape/trunk/revision/11463>

[Alex Valavanis (valavanisalex)]

Issue 1 was introduced in r11421 when I fixed the GSEAL issues in desktop widget [1]. The problem is that the gtk_message_dialog_get_message_area function was only introduced in gtk+ 2.22, which isn't available in Ubuntu Lucid.

The only real solutions, as far as I can see are...

1. Just get rid of this bit of code in Lucid. This will mean that the label in the dialog can gain focus (bug #168809) in Lucid... a minor issue.

2. Disable GSEAL_ENABLE for Lucid. Probably not an ideal solution!

[1] http://bazaar.launchpad.net/~inkscape.dev/inkscape/trunk/revision/11421

[Jon A. Cruz (jon-joncruz)]

Went with solution #1 in revision #11464

[su_v (suv-lp)]

Changing status to 'Fix Released' in accordance to [1] - the reported issue never occurred in a released version, only in current trunk. Please revert the bug status to 'Fix Committed' if you don't agree.

[1] <http://wiki.inkscape.org/wiki/index.php/Bug_management>