Crash when activating magnifier while hovering layer bar

[GoogleCodeExporter]

I get a guaranteed crash when pressing mouse3 (opens magnifier) while the mouse 
is over a layer button.
Stack trace indicates windows.c:2164, a call to Horizontal_XOR_line() that 
gives negative coordinates.
I think it's an issue of attempting to draw a specific mouse cursor while 
'Mouse is on menu'.

Original issue reported on code.google.com by yrizoud on 12 Mar 2012 at 1:14

[GoogleCodeExporter]

I think it's fixed by r1932, but need more testing, and probably refactor the 
redundant code that I put in a macro or something.

Original comment by yrizoud on 13 Mar 2012 at 7:56

• Changed state: Started

[GoogleCodeExporter]

Fixed

Original comment by yrizoud on 9 Apr 2012 at 3:32

• Changed state: Fixed