libs-gui: GSDragView doesn't check dragSource' delegate on NSDraggingSource

[Sergei Golovin via Discussion list for the GNUstep programming environment]

Hi!

I noticed that the NSWindow defines macros to check the destination
target' delegate on responding to NSDraggingDestination:

  GSPerformDragSelector
  GSPerformVoidDragSelector

Is there a reason not to do like that in GSDragView.m:606-620 that is
checking on responding to NSDraggingSource the dragSource' delegate?

-- 
Sergei Golovin