Remove GTK+ and GLib versions 1 relatedness from the GUI.

This isn't really a cut-back, because although it seemed
that compiling with GTK+ and GLib versions 1 were possible,
compiling actually hadn't been possible for quite some time.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@37272 b3059339-0415-0410-9bf9-f77b7e298cf2
Cosmetic: Adjust indent.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@37273 b3059339-0415-0410-9bf9-f77b7e298cf2
Revise message.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@37274 b3059339-0415-0410-9bf9-f77b7e298cf2
Revise German translation of MSGTR_GuiNeedsX.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@37275 b3059339-0415-0410-9bf9-f77b7e298cf2
Improve detection of GTK+ and GLib versions.

Demand minimum versions required by the GUI
and inform in detail in case the detected versions
are too old.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@37276 b3059339-0415-0410-9bf9-f77b7e298cf2
Cosmetic: Adjust indent.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@37277 b3059339-0415-0410-9bf9-f77b7e298cf2