partial match of just to justification

[botanize]

I realize this is pedantic, but may as well fix it.

With the warnPartialMatchDollar option set to true I get the warning In vp$just : partial match of 'just' to 'justification' that I've traced back to gtable.

The culprit appears here:

gtable/R/gtable.R

Line 120 in c410a54

just = vp$just, gp = vp$gp, xscale = vp$xscale,

Or maybe there's a good reason to abbreviate?

[botanize]

Just noticed #94