Fixed ProtoProxy compilation in MSVC2013.
Fixed ProtoProxy compilation in MSVC2013.

Fixes #983.

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