Avoid sending multiple damage events when scrolling basic-repl.
Avoid sending multiple damage events when scrolling basic-repl.

froggey/Mezzano,AugustusHuang/Mezzano,varjagg/Mezzano,froggey/Mezzano,rvedam/Mezzano,varjagg/Mezzano,rvedam/Mezzano,AugustusHuang/Mezzano