GDI object leak in Image->Adjust->Levels function

[pingpong]

Hello!
I have found what might be a bug in XnView.

XnView 1.99 and earlier.
Windows 7 x64 professional.

Function: Image->Adjust->Levels... (L)

XnView leaks GDI objects when using the sliders to adjust levels.
This can be observed using windows task manager.
On my current system at a rate of hundreds per second.
When reaching 9999, XnView GUI becomes garbled & unusable.

As I use this function quite a lot, I have to restart XnView very often.

[xnview]

ok, i'll check