Update RunnerProfitAndLost.cs

IfWin and IfLose should be double not long.

see here https://api.developer.betfair.com/services/webapps/docs/display/1smk3cen4v3lu3yomq5qye0ni/Betting+Type+Definitions#BettingTypeDefinitions-RunnerProfitAndLoss
Merge pull request #11 from efcdom/patch-1

Correcting the type of IfWin and IfLose, thanks @efcdom.