pspp-sheet-view: Remove write-only variable from pspp_sheet_view_draw_bin().
[pspp] / lib /
drwxr-xr-x   ..
-rw-r--r-- 21 .gitignore
-rw-r--r-- 235 automake.mk
drwxr-xr-x - gtk-contrib
drwxr-xr-x - linreg
drwxr-xr-x - tukey