Guard for undefined keypath (bis)
Guard for undefined keypath (bis)

Hi,
The keypath was undifined at this point, causing an uncatched exception/error.
This is the alternative fix for #1721, more general than the previous fix  #1724.
Cheers,
Arnaud
ndimas/ractive,ndimas/ractive,ISNIT0/ractive,JonDum/ractive,cgvarela/ractive,ISNIT0/ractive,heavyk/ractive,JonDum/ractive,thomsbg/ractive,squaredup/ractive,marcalexiei/ractive,Rich-Harris/ractive,aliprogrammer69/ractive,JonDum/ractive,Rich-Harris/ractive,Rich-Harris/ractive,dyx/ractive,magicdawn/ractive,pingjiang/ractive,ractivejs/ractive,aliprogrammer69/ractive,magicdawn/ractive,pingjiang/ractive,cgvarela/ractive,squaredup/ractive,dyx/ractive,aliprogrammer69/ractive,marcalexiei/ractive,thomsbg/ractive,squaredup/ractive,ractivejs/ractive,thomsbg/ractive,dyx/ractive,heavyk/ractive,magicdawn/ractive,heavyk/ractive,ractivejs/ractive,ISNIT0/ractive,marcalexiei/ractive,ndimas/ractive,cgvarela/ractive,pingjiang/ractive