branches: 1.2.4; 1.2.10; 1.2.22;
Replicate changes to get_window_size() made in previous location:

revision 1.7
date: 2010/01/24 16:45:57; author: christos; state: Exp;
make the window size function return the lines and columns
variables separately instead of depending on the existance
of struct winsize. Technically I should bump the library
version or version the symbol, but nothing seems to use
this outside the library!