Fix deprecated pango code always being used in glfont.cpp
The version check to see if the non-deprecated API is available, PANGO_VERSION_CHECK(1,22,0), always returns false if pango-features.h isn't included. This is because PANGO_VERSION_MAJOR, _MINOR, _MICRO are not defined and are evaluated as 0 in the preprocessor code.
This commit fixes compiling on Debian 8 using libpango1.0-dev 1.36.8. It was failing because deprecated function pango_ft2_get_context() was not available (hidden in pangoft2.h by PANGO_DISABLE_DEPRECATED).
This isn't a problem in TTimo/GtkRadiant 1.6 git master because pango-features.h is included in radiant/glwidget.cpp by stdafx.h -> gtk.h -> something -> pango.h -> pango-features.h
Edited by Zack Middleton