Fixed clang warnings about abs() in Noise.cpp.
Fixed clang warnings about abs() in Noise.cpp.

MSVC provides a float overload of abs(), clang does not. Using the proper fabs().

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