Fixes  #4423, Last zoom not remembered
Fixes  #4423, Last zoom not remembered

- corrected check condition

vishwakulkarni/cgeo,superspindel/cgeo,vishwakulkarni/cgeo,samueltardieu/cgeo,Huertix/cgeo,ThibaultR/cgeo,matej116/cgeo,brok85/cgeo,vishwakulkarni/cgeo,S-Bartfast/cgeo,Bananeweizen/cgeo,rsudev/c-geo-opensource,samueltardieu/cgeo,pstorch/cgeo,KublaikhanGeek/cgeo,madankb/cgeo,S-Bartfast/cgeo,xiaoyanit/cgeo,auricgoldfinger/cgeo,mucek4/cgeo,xiaoyanit/cgeo,tobiasge/cgeo,superspindel/cgeo,schwabe/cgeo,Huertix/cgeo,marco-dev/c-geo-opensource,SammysHP/cgeo,pstorch/cgeo,cgeo/cgeo,S-Bartfast/cgeo,marco-dev/c-geo-opensource,Huertix/cgeo,matej116/cgeo,brok85/cgeo,ThibaultR/cgeo,superspindel/cgeo,auricgoldfinger/cgeo,lewurm/cgeo,kumy/cgeo,KublaikhanGeek/cgeo,pstorch/cgeo,schwabe/cgeo,lewurm/cgeo,schwabe/cgeo,mucek4/cgeo,yummy222/cgeo,yummy222/cgeo,schwabe/cgeo,rsudev/c-geo-opensource,marco-dev/c-geo-opensource,yummy222/cgeo,kumy/cgeo,lewurm/cgeo,matej116/cgeo,xiaoyanit/cgeo,cgeo/cgeo,rsudev/c-geo-opensource,KublaikhanGeek/cgeo,Bananeweizen/cgeo,madankb/cgeo,samueltardieu/cgeo,SammysHP/cgeo,tobiasge/cgeo,madankb/cgeo,mucek4/cgeo,cgeo/cgeo,kumy/cgeo,auricgoldfinger/cgeo,ThibaultR/cgeo,SammysHP/cgeo,tobiasge/cgeo,brok85/cgeo,Bananeweizen/cgeo,cgeo/cgeo