Fix CGeoMap.ConcurrentModificationException
Fix CGeoMap.ConcurrentModificationException

Fixed one unsynchronised cache list access

SammysHP/cgeo,S-Bartfast/cgeo,tobiasge/cgeo,samueltardieu/cgeo,SammysHP/cgeo,SammysHP/cgeo,S-Bartfast/cgeo,pstorch/cgeo,mucek4/cgeo,matej116/cgeo,cgeo/cgeo,tobiasge/cgeo,auricgoldfinger/cgeo,kumy/cgeo,cgeo/cgeo,rsudev/c-geo-opensource,auricgoldfinger/cgeo,pstorch/cgeo,tobiasge/cgeo,mucek4/cgeo,samueltardieu/cgeo,rsudev/c-geo-opensource,superspindel/cgeo,kumy/cgeo,matej116/cgeo,cgeo/cgeo,Bananeweizen/cgeo,Bananeweizen/cgeo,S-Bartfast/cgeo,samueltardieu/cgeo,pstorch/cgeo,kumy/cgeo,superspindel/cgeo,Bananeweizen/cgeo,matej116/cgeo,rsudev/c-geo-opensource,auricgoldfinger/cgeo,mucek4/cgeo,superspindel/cgeo,cgeo/cgeo