Re: jsm_tty: Fix a possible null pointer dereference in two functions

[SF Markus Elfring]

>> It's pretty unlikely, but it is an actual defect.
> 
> No it is not, those variables will never be set to NULL,
> so this can never be triggered.  Walk up the call chain.

If the involved software developers are convinced about the validity
of this pointer:

How do you think about to delete the following condition check
instead in the discussed function implementations?

	if (!ch)
		return;


Regards,
Markus