Trying to zoom with ctrl+scroll up/down changes virtual size

[GoogleCodeExporter]

What steps will reproduce the problem?
1.Draw some classes on diagram;
2.File -> Print/Preview;
3.Ctrl+mouse scroll up and down;

Nothing happens on GUI, but the console shows messages like "Setting virtual 
size to X, Y" at each scroll change. Now, closing the print preview and looking 
at the diagram, it is obvious that something (I think virtual size indeed :D) 
has changed.

If I select, in the print preview window, the zoom drop-down, then ctrl+mouse 
scroll changes that zoom value, which I think is what regular user expects.

Again, if I click something else (like left arrows) ctrl+scroll changes virtual 
size as before.

v. 1.61 Windows 7 64-bit

Original issue reported on code.google.com by cristian...@yahoo.com on 21 Jul 2014 at 12:30

[GoogleCodeExporter]

Sorry for misleading title, I forgot to mention that this happens in print 
preview window.

Original comment by cristian...@yahoo.com on 21 Jul 2014 at 12:31