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.World/ByteArrayInputStream.cpp

@@ -114,5 +114,5 @@ int64_t ByteArrayInputStream::skip(int64_t n)
 
 ByteArrayInputStream::~ByteArrayInputStream()
 {
-	if(buf.data != nullptr) delete [] buf.data;
+	if(buf.data != NULL) delete [] buf.data;
 }