More efficient callback setup in when().  Smaller code size, too!
More efficient callback setup in when().  Smaller code size, too!

tkirda/when,mlennon3/when,ning-github/when,caporta/when,SourcePointUSA/when,SourcePointUSA/when,DJDNS/when.js,anthonyvia/when,rwaldron/when.js,frank-weindel/when,anthonyvia/when,petkaantonov/when,ning-github/when,icodeforlove/whenplus,mlennon3/when,stevage/when,tkirda/when,frank-weindel/when,stevage/when,caporta/when