Keybox too small for user defined location when using splot

[Mike S. <mw...@us...>]

for 4.2 CVS branch.

When I run the the script below the keybox is incorrectly drawn.  The bottom 
of the keybox cuts right between the cos and tan entries in the key.  If I 
omit the key title the box is drawn correctly.

set term x11 persist
set key box
set key title "KEY TITLE LONG"
set key box at screen .9, screen .98
splot x,x,sin(x),cos(x),tan(x)

Mike Sutton