[osg-submissions] Small osgText fix

[Robert Osfield]

Hi Panagiotis,

On 10/3/07, Panagiotis Papadakos <papadako at csd.uoc.gr> wrote:
> Well, I am not sure about this, but I don't think it is wrong.
> At least I know it would be helpful for me, and as long as word
> wrapping on the horizontal axis, constraints our text horizontally, why
> not let the user to constraint also on the vertical axis as long as he
> sets _maximumHeight && _maximumWidth > 0.0?

I would lean to this mode of operation too, if the user sets it then
use it, otherwise if the default values are applied i.e. 0.0 then
nothing new should happen.

I'll go ahead merge your change, I think its pretty safe.

Robert.