When running terminfo but compiled for termcap, we cannot assume
that we actually have anything useable in termcap_term_buffer so just
use the terminfo fixed size defined ealier.

--- src/term.c	2010-01-14 22:17:00.000000000 +0000
+++ src/term.c	2010-01-14 22:22:09.000000000 +0000
@@ -3593,7 +3593,6 @@
 #ifndef TERMINFO
   if (strlen (tty->termcap_term_buffer) >= buffer_size)
     abort ();
-  buffer_size = strlen (tty->termcap_term_buffer);
 #endif
   tty->termcap_strings_buffer = area = (char *) xmalloc (buffer_size);
   tty->TS_ins_line = tgetstr ("al", address);