Revert "Project modernization (#630)"

This code was not tested and breaks in Release builds, reverting to restore
functionality of the nightly. All in-game menus do not work and generating
a world crashes.

This reverts commit a9be52c41a.

Minecraft.Client/Common/DLC/DLCGameRulesFile.cpp

@@ -4,7 +4,7 @@
 
 DLCGameRulesFile::DLCGameRulesFile(const wstring &path) : DLCGameRules(DLCManager::e_DLCType_GameRules,path)
 {	
-	m_pbData = nullptr;
+	m_pbData = NULL;
 	m_dwBytes = 0;
 }