Eric Wasylishen
Small change to checkkeys so you can toggle text input mode with a mouse click.
This is needed for testing how dead keys react to toggling mouse input, i.e. these bugs:
The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly
uninitialized data structure if loading the library first failed. A later try to
use EGL then skipped initialization and assumed it was previously successful
because the data structure now already existed. This led to at least one crash
in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was
dereferenced to make a call to eglBindAPI().
