lbshell error (undefined variable) using external programs menu

term Node 9 !JavaScript /sbbs/exec/lbshell.js line 713: TypeError: xtrn_area.sec_list[curr_xtrnsec].prog_list[parseInt(x_prog)] is undefined

added bug label

closed with commit dd2ab2e7

mentioned in commit dd2ab2e7

mentioned in commit 25122d66