[PATCH] Fix compilation of tui/tui.c

[Andrew Cagney]

> Ouch.  We have serious portability problems with the TUI.  We should
> either disable it again before the 6.1 release, or be prepared to
> release 6.1.1 if any build problems come up.  I'm sure we'll see build
> problems on many systems that we don't regularly test.
> 
> Anyway, I committed the attached such that FreeBSD (and probably the
> other BSD's work again/.

It works on my bsd system (how do you think I was testing it)?  What 
portability problem.  Is there a reason for changing "" to <>, it breaks 
some of GDB's scripts.

Andrew