configure.in: no CXX needed
configure.in: fixed WIDGET_LIBS handling

These get defined but aren't substituted in some cases.
configure: regenerated
Makefile.in: sgicpu.xpm is used in Computer.c
applied rpmfusion's xbill-2.1-gtk2.patch from gentoo

(added quoting of course)
configure: regenerated
Merge pull request #5 from gvy/master

configure.in and Makefile.in fixes #5