Replace NULL with nullptr

[ghost]

Some zeros have also been replaced.

[pjasicek]

Thanks for the pull request but whole repository-wide search-and-replace of NULL with nullptr is not really the way to go nor do I see any reason to do this.

Most of the affected files would be libraries anyway - mainly Box2D but I also saw SDL headers getting NULL replaced with nullptr which is not good as SDL is pure C lib (even if it's just in the comments).

[ghost]

You're right, I'll rebase.
Edit:
Should be ok now.

[ghost]

"nor do I see any reason to do this."
Do you mean, you don't see advantage of using nullptr?

NULL is just zero, so it's able to implicit cast and call another (overloaded) function.
https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#Res-nullptr

[pjasicek]

This is one of the reasons I don't like system/project wide search-and-replace in already working (and not maintained) codebase :)

[ghost]

Sorry for long response time, it should be fixed now.

[pjasicek]

Yes I know the difference between NULL and nullptr ;) Any new code based on C++11/14/17 standard should use nullptr instead of NULL.

Nonetheless, I really do not like the idea of even project-wide search-and-replace which in effect does not solve anything. Even more so when I do not work on this project anymore.

[jadsonosd]

Have to run in android too java runner.
I found a game for smartphone too :D