fix NPE in CachePopupFragment when cache no longer available (fix #8321) (#8322)
fix NPE in CachePopupFragment when cache no longer available (fix #8321) (#8322)


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