Fix for door, screen door combination, jammed slider

[DaveFL]

Locked ourselves in by closing door and not noticing sliding door was closed, it refused to open and I didn't want to break anything so I opened from outside. Turns out the locking devise used to hold the screen to the outside door catch mechanism was a quarter of an inch too long, ground off the catch part attached to door that screen pushes against. AS changed the design as newer sliders have a flexible lip to pass over handles as it slides open.