Steps to reproduce
1.	Create new presentation
2.	Set zoom value to “Fit width and height” (View --> Zoom --> “Fit width and
height” --> “OK”)
3.	Resize application’s window 
=> slide’s size is changed to fit new window’s size
4.	Open “Zoom & View Layout” dialog once more (View --> Zoom)
=> in the dialog zoom is set to “Variable”
5.	Close the dialog without saving changes (“Cancel”)
6.	Resize application window

Actual result: Slide’s size remains the same; it is not change to fit new
window’s size. So it looks like zoom is really reset to “Variable”.

Notes
1.	The same issue for “Optimal” and “Fit width” zoom type’s
2.	The same issue in OOo3.3
3.	The exact way we change zoom on step 2 (menu, task bar button) does not matter.