John correctly observed that the initialization {OldHeight} and

John correctly observed that the initialization {OldHeight} and
{OldWidth} in the window structure should be done for both windows
and sub-windows, and the easiest way to do this is in the
freeglut_structure.c:fgCreateWindow() code.  So, transplant one line.

git-svn-id: svn+ssh://svn.code.sf.net/p/freeglut/code/trunk/freeglut/freeglut@383 7f0cb862-5218-0410-a997-914c9d46530a