[Qt] DestroyGlobalCaret

[Vincent Snijders]

Hi,

I looked at r11564.

procedure DestroyGlobalCaret can be much simpler:

FreeAndNil(GlobalCaret);

I don't know if DestroyGlobalCaret is called from more than one place, but if it is 
used in only one place, I would remove the complete procedure.

Vincnet