OpenScreen(0,0,32,"") is allow wtf

[Dreglor]

err i enter in the OpenScreen() command with 0 width and hieght werid is that pb compiler allowed it and the screen didn't accally come up the desktop was still there only (if i have my bitdepth the same as the desktop) but when 16 i think it only changes that it seams to black out until somthing affecting the drawing of the window...like bitblt_ which was a few lines down
werider is that the commands require a screen are still allowed like the createsprite command that was just after it .. it didn't error out
im kinda confused what and why this happens