Tue Feb 24 22:05:41 2009  Jiri (George) Lebl <jirka@5z.com>

	* gtkextra/gtkplotdata.c, gtkextra/gtkplotgdk.c: Move the line
	  clipping code from the GDK backend to the plotdata.  Replace
	  the one relevant draw_lines call with the new one.  I wonder
	  if this should be done in more places.  This is a mess!
	  There are still bugs if you zoom in way too much.  Not quite sure
	  what the bug is.  We may need to actually move the endpoints 
	  of the line.  This fixes broken EPS/PS export and printing
	  when zoomed in to a slopefield/vectorfield/parametric graph.


svn path=/trunk/; revision=735