Fix patient view crash when no mutations
Fix patient view crash when no mutations

For patients without mutations there was an undefined error when trying
to determine the genomeBuild.


Former-commit-id: 5ce040a1bb0784eb6e8d0df17ee9594f4d88630b
alisman/cbioportal-frontend,alisman/cbioportal-frontend,cBioPortal/cbioportal-frontend,alisman/cbioportal-frontend,cBioPortal/cbioportal-frontend,cBioPortal/cbioportal-frontend,cBioPortal/cbioportal-frontend,alisman/cbioportal-frontend,alisman/cbioportal-frontend,cBioPortal/cbioportal-frontend,alisman/cbioportal-frontend,cBioPortal/cbioportal-frontend