build error fixed introduced with 59c064e
build error fixed introduced with 59c064e

See https://travis-ci.org/ZGIS/smart-portal-webgui/builds/270882093

ZGIS/smart-portal-webgui,ZGIS/smart-portal-webgui,ZGIS/smart-portal-webgui,ZGIS/smart-portal-webgui,ZGIS/smart-portal-webgui