Needed to get ircii to successfully run in 64-bit mode with Solaris
libtermcap (really libcurses). Also need to have -DINCLUDE_CURSES_H
defined in the component Makefile.

This patch has not been sent upstream, because the Solaris integration
of termcap diverges from the way that Linux systems do this.

On Linux systems you do not need to have -DINCLUDE_CURSES_H defined, in 
order to build ircii. The tgoto() routine has a prototype definition in 
/usr/include/termcap.h (supplied by the ncurses package), which is 
found by configure:

...
checking for termcap.h... yes
...

On Solaris, we do not have a /usr/include/termcap.h file. Therefore,
according to the curs_termcap(3CURSES) man page, for C sources files
that want to use the tgoto() routine, we need to include both 
"#include <curses.h" and "#include <term.h>". For that we need to define
-DINCLUDE_CURSES_H and also patch it to include term.h

--- ircii-20111115/include/ircterm.h.orig	2013-05-09 14:53:15.390715728 -0700
+++ ircii-20111115/include/ircterm.h	2013-05-09 14:53:37.227217484 -0700
@@ -39,6 +39,7 @@
 
 #ifdef INCLUDE_CURSES_H
 # include <curses.h>
+# include <term.h>
 #endif /* INCLUDE_CURSES_H */
 
 extern	int	term_reset_flag;