[Bug-zile] SIGSEGV in term_init

[Mike Gran]

Hi,

In zile-2.4.2, in term_curses.c in term_init(), the call to
tigetstr(capname)
can return NULL if CAPNAME is not a capability of the terminal.
Such as when zile is called from within emacs's eshell.

In this case, the following line

assert (strlen (kbs) == 1);

can SIGSEGV by calling strlen on NULL.

SHould probably be

assert (kbs && strlen (kbs) == 1);

-Mike Gran