fix #1151: Clicking "Spotted in" on trackable screen can give Exception
fix #1151: Clicking "Spotted in" on trackable screen can give Exception
mucek4/cgeo,SammysHP/cgeo,S-Bartfast/cgeo,brok85/cgeo,auricgoldfinger/cgeo,cgeo/cgeo,lewurm/cgeo,pstorch/cgeo,SammysHP/cgeo,superspindel/cgeo,tobiasge/cgeo,rsudev/c-geo-opensource,xiaoyanit/cgeo,Huertix/cgeo,S-Bartfast/cgeo,pstorch/cgeo,mucek4/cgeo,matej116/cgeo,madankb/cgeo,schwabe/cgeo,madankb/cgeo,kumy/cgeo,tobiasge/cgeo,matej116/cgeo,cgeo/cgeo,madankb/cgeo,cgeo/cgeo,schwabe/cgeo,KublaikhanGeek/cgeo,marco-dev/c-geo-opensource,samueltardieu/cgeo,kumy/cgeo,Bananeweizen/cgeo,rsudev/c-geo-opensource,superspindel/cgeo,tobiasge/cgeo,yummy222/cgeo,brok85/cgeo,KublaikhanGeek/cgeo,schwabe/cgeo,rsudev/c-geo-opensource,SammysHP/cgeo,marco-dev/c-geo-opensource,superspindel/cgeo,auricgoldfinger/cgeo,auricgoldfinger/cgeo,samueltardieu/cgeo,Bananeweizen/cgeo,vishwakulkarni/cgeo,yummy222/cgeo,Bananeweizen/cgeo,S-Bartfast/cgeo,schwabe/cgeo,xiaoyanit/cgeo,brok85/cgeo,pstorch/cgeo,lewurm/cgeo,Huertix/cgeo,mucek4/cgeo,kumy/cgeo,Huertix/cgeo,xiaoyanit/cgeo,KublaikhanGeek/cgeo,matej116/cgeo,ThibaultR/cgeo,ThibaultR/cgeo,ThibaultR/cgeo,yummy222/cgeo,samueltardieu/cgeo,lewurm/cgeo,cgeo/cgeo,vishwakulkarni/cgeo,marco-dev/c-geo-opensource,vishwakulkarni/cgeo