Usually something like __IRR_SOME_GUARD_INCLUDED__ replaced by IRR_SOME_GUARD_INCLUDED.
Removing underscores at the end wasn't necessary, but more symmetric (probably the reason they got added there as well).
While this touches every header it shouldn't affect users (I hope).
Also a few whitespace changes to unify whitespace usage a bit.
And a bunch of spelling fixes in comments.
git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@6252 dfc29bdd-3216-0410-991c-e03cc46cb475
Thanks @TheBrokenRail for a patch proposal based on example code from esjeon (patch #322).
See https://sourceforge.net/p/irrlicht/patches/322
Original example code here: https://github.com/esjeon/xinput2-touch
Users have to enable _IRR_LINUX_X11_XINPUT2_ in IrrCompileConfig and link with Xi to make this work.
I rewrote the patch a bit and have no system for testing here, so this still needs some testing.
I also backported EET_TOUCH_INPUT_EVENT for this from the ogl-es branch.
git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@6178 dfc29bdd-3216-0410-991c-e03cc46cb475