fix db upgrade error
fix db upgrade error

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