[PATCH] ui/ncurses: Prevent crash if bd->image NULL

[Jeremy Kerr]

Hi Sam,

> The discover server can pass boot options with no actual
> boot data if parsing conf files such as:
> 
> label Dummy entry
> 
> label Rexec petitboot latest
> 	kernel tftp://host/petitboot/vmlinux
> 	initrd tftp://host/petitboot/rootfs.cpio.xz

This shouldn't be allowed - we (currently) require that at least ->image
is set for a boot_option. If that's not the case, we need to fix the
boot options that are being created here.

Cheers,


Jeremy