[lazarus] Lazarus memory leaks when painting

[Michal Bukovjan]

Hi,

Looks like we are leaking a decent amount of memory with Lazarus when 
painting occurs.
Try running Lazarus, move your mouse to and fro over the component 
palette speedbuttons row, several times, memory usage grows by a megabyte.
Do that few times more, and Lazarus memory usage grows from about 8MB to 
27MB in my case!

:-(

Michal