[Linphone-developers] Compilation fixes and support for old gtk releases

[Miguel Angel Alvarez]

Hi all!
Linphone 3.5.0 uses a few non-essential gtk>2.14 functions mostly for 
eyecandy, plus the ui files require a gtk version which isn't really needed 
as gtkbuilder gracefully ignores not known properties.

This breaks linphone in not-so-old LTS linux distros, including the N900 
phone, where it is not that easy to update the gtk stack.

This patch addresses this problem by providing stubs for any gtk function not 
present in gtk<2.20, and lowering the version requirement in ui files.
It also adds menu entries to the icon menu.

The resulting build with gtk-2.14 works fine, and the only noticeable 
difference wrt previous linphone releases is the lack of the main application 
menu (gtkbuilder didn't work with menus till gtk-2.16), which is solved by 
the new icon menu entries.

Patch is against latest git.
-- 
Don't see the world through a window, be open{source}minded, and be free :-)

linphone-gtkfixes.patch
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