Added a sanity check to cBlockArea:Crop()
Added a sanity check to cBlockArea:Crop()

git-svn-id: ffe80d23790c2318db4f9b6ad70c6163efa9c8e4@1197 0a769ca7-a7f5-676a-18bf-c427514a06d6

nicodinh/cuberite,Fighter19/cuberite,electromatter/cuberite,birkett/cuberite,SamOatesPlugins/cuberite,mjssw/cuberite,kevinr/cuberite,marvinkopf/cuberite,Schwertspize/cuberite,HelenaKitty/EbooMC,thetaeo/cuberite,jammet/MCServer,kevinr/cuberite,birkett/MCServer,linnemannr/MCServer,SamOatesPlugins/cuberite,bendl/cuberite,thetaeo/cuberite,Fighter19/cuberite,johnsoch/cuberite,Haxi52/cuberite,mc-server/MCServer,Howaner/MCServer,nicodinh/cuberite,nounoursheureux/MCServer,kevinr/cuberite,electromatter/cuberite,linnemannr/MCServer,Howaner/MCServer,guijun/MCServer,linnemannr/MCServer,tonibm19/cuberite,mmdk95/cuberite,mmdk95/cuberite,MuhammadWang/MCServer,mc-server/MCServer,nichwall/cuberite,mc-server/MCServer,mjssw/cuberite,SamOatesPlugins/cuberite,birkett/cuberite,Fighter19/cuberite,birkett/cuberite,bendl/cuberite,QUSpilPrgm/cuberite,mc-server/MCServer,ionux/MCServer,Schwertspize/cuberite,birkett/cuberite,mc-server/MCServer,johnsoch/cuberite,mc-server/MCServer,electromatter/cuberite,Schwertspize/cuberite,tonibm19/cuberite,HelenaKitty/EbooMC,nicodinh/cuberite,nounoursheureux/MCServer,Howaner/MCServer,guijun/MCServer,nevercast/cuberite,linnemannr/MCServer,nounoursheureux/MCServer,HelenaKitty/EbooMC,zackp30/cuberite,kevinr/cuberite,zackp30/cuberite,mmdk95/cuberite,mjssw/cuberite,Altenius/cuberite,jammet/MCServer,mmdk95/cuberite,nicodinh/cuberite,electromatter/cuberite,Tri125/MCServer,kevinr/cuberite,nevercast/cuberite,linnemannr/MCServer,birkett/MCServer,thetaeo/cuberite,MuhammadWang/MCServer,zackp30/cuberite,Haxi52/cuberite,birkett/MCServer,mjssw/cuberite,nichwall/cuberite,nichwall/cuberite,tonibm19/cuberite,Fighter19/cuberite,HelenaKitty/EbooMC,johnsoch/cuberite,Frownigami1/cuberite,Frownigami1/cuberite,marvinkopf/cuberite,Schwertspize/cuberite,bendl/cuberite,bendl/cuberite,Fighter19/cuberite,birkett/cuberite,ionux/MCServer,marvinkopf/cuberite,ionux/MCServer,QUSpilPrgm/cuberite,QUSpilPrgm/cuberite,QUSpilPrgm/cuberite,MuhammadWang/MCServer,birkett/MCServer,thetaeo/cuberite,nevercast/cuberite,bendl/cuberite,SamOatesPlugins/cuberite,Schwertspize/cuberite,mjssw/cuberite,Howaner/MCServer,kevinr/cuberite,Altenius/cuberite,guijun/MCServer,tonibm19/cuberite,nichwall/cuberite,johnsoch/cuberite,Frownigami1/cuberite,tonibm19/cuberite,Tri125/MCServer,nounoursheureux/MCServer,nicodinh/cuberite,jammet/MCServer,MuhammadWang/MCServer,Tri125/MCServer,nevercast/cuberite,Howaner/MCServer,birkett/cuberite,Frownigami1/cuberite,nichwall/cuberite,birkett/MCServer,marvinkopf/cuberite,marvinkopf/cuberite,thetaeo/cuberite,zackp30/cuberite,electromatter/cuberite,zackp30/cuberite,Haxi52/cuberite,HelenaKitty/EbooMC,linnemannr/MCServer,MuhammadWang/MCServer,Altenius/cuberite,nichwall/cuberite,jammet/MCServer,guijun/MCServer,marvinkopf/cuberite,Fighter19/cuberite,QUSpilPrgm/cuberite,ionux/MCServer,guijun/MCServer,Altenius/cuberite,nounoursheureux/MCServer,Haxi52/cuberite,mmdk95/cuberite,johnsoch/cuberite,Haxi52/cuberite,nicodinh/cuberite,tonibm19/cuberite,SamOatesPlugins/cuberite,ionux/MCServer,zackp30/cuberite,Howaner/MCServer,Haxi52/cuberite,mjssw/cuberite,Altenius/cuberite,jammet/MCServer,nevercast/cuberite,thetaeo/cuberite,ionux/MCServer,electromatter/cuberite,mmdk95/cuberite,nounoursheureux/MCServer,jammet/MCServer,nevercast/cuberite,Tri125/MCServer,guijun/MCServer,Frownigami1/cuberite,Tri125/MCServer,Tri125/MCServer,birkett/MCServer,QUSpilPrgm/cuberite