Fix incorrect kevent structure size (#2312)
Fix incorrect kevent structure size (#2312)

We might try to add up to 4 items to the array but we only sized for 3.
This bug date back a couple years to when signal handling support was
added.
kulibali/ponyc,sgebbie/ponyc,Theodus/ponyc,CausalityLtd/ponyc,dipinhora/ponyc,kulibali/ponyc,cquinn/ponyc,Praetonus/ponyc,dipinhora/ponyc,kulibali/ponyc,jemc/ponyc,cquinn/ponyc,Praetonus/ponyc,CausalityLtd/ponyc,jemc/ponyc,cquinn/ponyc,ponylang/ponyc,sgebbie/ponyc,sgebbie/ponyc,ponylang/ponyc,Theodus/ponyc,sgebbie/ponyc,Praetonus/ponyc,cquinn/ponyc,sgebbie/ponyc,kulibali/ponyc,Theodus/ponyc,jemc/ponyc,CausalityLtd/ponyc,Theodus/ponyc,dipinhora/ponyc,Praetonus/ponyc,ponylang/ponyc,Theodus/ponyc