xgnokii: generic icon in Xfce Task List and alt+tab window

[Charles]

Hello :-)

When running xgnokii under Xfce, the icon displayed in the Task List and 
alt+tab window is a generic window.

In case it helps, I had a similar problem with urxvt which was fixed by 
building with libAfterImage library integration enabled (later changed 
to the preferred pixbuf library).  AFAIK under Xfce, applications set 
their own icons via _NET_WM_ICON as described at 
http://standards.freedesktop.org/wm-spec/wm-spec-1.3.html#id2507733

The version of xgnokii was built from gnokii source downloaded from 
http://git.savannah.gnu.org/cgit/gnokii.git/snapshot/gnokii-master.tar.gz on 
5 March at 16:48 UTC.

The essential build steps were:

libtoolize -c -f
glib-gettextize -f -c
intltoolize --force --copy --automake
aclocal -I m4/
autoheader -I m4/
automake --add-missing
autoconf
./configure \
  --prefix=/usr \
  --libdir=/usr/lib64 \
  --sysconfdir=/etc \
  --localstatedir=/var \
  --mandir=/usr/man \
  --docdir=/usr/doc/gnokii--master.110505-16:48UTC \
  --disable-static \
  --enable-security \
  --build=x86_64-slackware-linux

Best

Charles