[openib-general] [librdmacm] changes to cmatose to return a value different than 0 when there is a failure

[Sean Hefty]

Dotan Barak wrote:
> Added checks to the return values of all of the functions that may fail
> (in order to add this test to the regression system).

Thanks - applied with one minor change.

> +	int rc;

Changed 'rc' to 'ret' to match the rest of the code.

- Sean