[Freeciv-Dev] (PR#6535) gui-gtk compile error

["Jason Short" <jdorje@xxxxxxxxxxxxxxxxxxxxx>]

if gcc -DHAVE_CONFIG_H -I. -I. -I../.. -I. -I./.. -I./../include 
-I../../common -I../../common/aicore -I../../intl -I./../agents 
-I/usr/local/include/gtk-1.2 -I/usr/local/include/glib-1.2 
-I/usr/local/lib/glib/include -I/usr/local/include -I/usr/local/include 
-I/usr/local/include    -g -O -Wall -Werror -Wcast-align 
-Wmissing-prototypes -Wmissing-declarations -MT wldlg.o -MD -MP -MF 
".deps/wldlg.Tpo" \
   -c -o wldlg.o `test -f 'wldlg.c' || echo './'`wldlg.c; \
then mv -f ".deps/wldlg.Tpo" ".deps/wldlg.Po"; \
else rm -f ".deps/wldlg.Tpo"; exit 1; \
fi
repodlgs.c: In function `economy_selloff_callback':
repodlgs.c:729: `packet' undeclared (first use in this function)
repodlgs.c:729: (Each undeclared identifier is reported only once
repodlgs.c:729: for each function it appears in.)