refactor: modernize NULL to nullptr

[bobtista]

• Used clang-tidy to consistently change NULL->nullptr
• Added include for cppMacros to files that use nullptr and didn't have it (required for VC6)

Tested build and played a game successfully.

A Follow up PR can:

• clean up the #define NULL 0
• replace remaining NULLs with 0 (or a named

[xezon]

Adding the CppMacros include everwhere should not be necessary.

[xezon]

These includes should not be necessary in most cases. The include should come through WWCommon already. If not, then an always.h (WWVegas) or PreRTS.h (GameEngine) include is missing somewhere. GameEngineDevice does not use PreRTS.h there is may be necessary sometimes, but I would expect not in many cases because WWVegas stuff gets always.h

[bobtista]

Good catch, I removed it from files that include always.h, PreRTS.h, and BaseType.h - cleaned up 387 of 395 of them

[xezon]

Can you merge the last commit with the first, to see which includes are left over?

[Mauller]

If you interactively rebase you should be able to drop the first and last commit entirely during the rebase so you only have the wanted commits left.

[xezon]

It depends if there are any includes left added. But it is hard to review because github has trouble showing the diff :D

[bobtista]

Can you merge the last commit with the first, to see which includes are left over?

Done

[xezon]

This needs another pass because #1594 has added a few new NULL's

[xezon]

When I search for NULL across whole project, then it finds 20231 NULLs, but this change only touched 8724 NULLs. Why is there this large discrepancy?