[Guy Harris <guy@xxxxxxxxxx>]

> 	with the latest build tree, I get the following error.
> 	it seems to me that epan/Makefile should include GTK_CFLAGS and some
> 	other items, so that we can refer to gtk/gtk.h correctly.
> 	(sorry i'm novice in automake arena, no fix is provided)

Or maybe we should simply arrange that one isn't obliged to include GTK+
headers in non-GUI code that just wants to refer to the user's
preferences.

I've just checked in a change to do that; "prefs.h" now refers to colors
as "color_t" structures, declared in "color.h" - currently, a "color_t"
looks just like a GdkColor (but doesn't require any GTK/GDK headers for
its definition), but we may change that in the future if we support more
than just GDK (Qt/KDE, Windows/MFC, curses - versions of curses
compatible with recent System V curses support color).