[Xwt.XamMac] Fix a regression in e1275a29
[Xwt.XamMac] Fix a regression in e1275a29

There were some missing braces, so commit e1275a29 resulted in the
event *always* emitting. Oops.

mminns/xwt,antmicro/xwt,cra0zy/xwt,lytico/xwt,hamekoz/xwt,iainx/xwt,akrisiun/xwt,hwthomas/xwt,TheBrainTech/xwt,mminns/xwt,residuum/xwt,steffenWi/xwt,mono/xwt