It's an SDL_TEXTEDITING event which we seem to get on Windows whenever
the Window gains focus (or is created). I think it can be safely
ignored, so that's what I do.
I also changed how those warnings are printed - as a hex number now,
because they're defined as hex numbers in the SDL source and it's easier
to find out what kind of event it is this way.
If res_none (event with .evType == EV_NONE) is returned,
idEventLoop::RunEventLoop() will assume there are no more events this
frame => pending events will be delayed til next frame (or later if
again res_none is returned in the meantime).
So res_none shouldn't be returned just because there was an SDL event
we didn't care about or we did care about but don't generate a doom3
event for (but toggle fullscreen or something).
Instead we should just fetch and handle the next SDL event.
There used to be a bug (discussed in #40), that ALT was still set after
using ALT-Tab. Thus when next pressing enter fullscreen was toggled.
This should now be fixed by unsetting the modifiers when focus is
regained (SDL_ACTIVEEVENT or SDL_WINDOWEVENT_FOCUS_GAINED).
New CVar "in_kbd" to set the layout for the keyboard. SDL 1.2
doesn't offer any way to determine it, and we need this feature
to use the same key for toggling the console independent of the
keyboard layout.
The old "in_nograb" from the Linux backend is still supported.
