o que é 'preview_window' e 'RrTheme'

src/preview.c: In function 'preview_window':
src/preview.c:552:26: error: 'RrTheme' has no member named 'a_focused_unpressed_desk'
src/preview.c:553:26: error: 'RrTheme' has no member named 'a_unfocused_unpressed_desk'
src/preview.c:557:26: error: 'RrTheme' has no member named 'a_focused_unpressed_shade'
src/preview.c:558:26: error: 'RrTheme' has no member named 'a_unfocused_unpressed_shade'
src/preview.c:562:26: error: 'RrTheme' has no member named 'a_focused_unpressed_iconify'
src/preview.c:563:26: error: 'RrTheme' has no member named 'a_unfocused_unpressed_iconify'
src/preview.c:567:26: error: 'RrTheme' has no member named 'a_focused_unpressed_max'
src/preview.c:568:26: error: 'RrTheme' has no member named 'a_unfocused_unpressed_max'
src/preview.c:572:26: error: 'RrTheme' has no member named 'a_focused_unpressed_close'
src/preview.c:573:26: error: 'RrTheme' has no member named 'a_unfocused_unpressed_close'
make[2]: ** [src/src_obconf_la-preview.lo] Erro 1
make[2]: Saindo do diretório `/tmp/SBo/lxappearance-obconf-0.2.0'
make[1]: ** [all-recursive] Erro 1
make[1]: Saindo do diretório `/tmp/SBo/lxappearance-obconf-0.2.0'
make: ** [all] Erro 2

lxappearance-obconf-0.2.0/.gitignore
lxappearance-obconf-0.2.0/AUTHORS
lxappearance-obconf-0.2.0/autogen.sh
+ '[' x '!=' x ']'
+ aclocal
/usr/share/aclocal/imlib.m4:9: warning: underquoted definition of AM_PATH_IMLIB
/usr/share/aclocal/imlib.m4:9: run info '(automake)Extending aclocal'
/usr/share/aclocal/imlib.m4:9: or see http://www.gnu.org/software/automake/manual/automake.html#Extending-aclocal
+ autoheader --force
+ AUTOMAKE=automake

http://www.vivaolinux.com.br/dica/Instalando-o-LXDE-no-Slackware-13.1