Fixed a crash in message formatter.
Fixed a crash in message formatter.

The code would fail if a message is sent to a player not yet added to a world.

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