Adapt GC login to changed error message
Adapt GC login to changed error message

S-Bartfast/cgeo,auricgoldfinger/cgeo,tobiasge/cgeo,rsudev/c-geo-opensource,tobiasge/cgeo,rsudev/c-geo-opensource,cgeo/cgeo,matej116/cgeo,auricgoldfinger/cgeo,cgeo/cgeo,cgeo/cgeo,cgeo/cgeo,auricgoldfinger/cgeo,matej116/cgeo,S-Bartfast/cgeo,S-Bartfast/cgeo,matej116/cgeo,rsudev/c-geo-opensource,tobiasge/cgeo