Error in Haem referral pathway

[davidmiller]

To reproduce:

1. Log in
2. Referrals
3. Haem referral make referral
4. Hospital number 123, -> Search
5. Next
6. Add Patient

Console error is:

angular.js:13920 TypeError: Cannot read property 'hospital_number' of undefined
    at Scope.scope.preSave (uch_find_patient.js:63)
    at pathway.js:79
    at Function._.each._.forEach (underscore.js:162)
    at WizardPathway.finish (pathway.js:77)
    at fn (eval at compile (angular.js:14817), <anonymous>:4:542)
    at expensiveCheckFn (angular.js:15906)
    at callback (angular.js:25885)
    at Scope.$eval (angular.js:17682)
    at Scope.$apply (angular.js:17782)
    at HTMLButtonElement.<anonymous> (angular.js:25890)