[PATCH libX11] Fix three "use of uninitialized variable" coverity warnings

[Alan Coopersmith]

On 05/18/15 07:42 PM, Peter Hutterer wrote:
> False positive, if rlen/nbytes are unset we quit early before using it. Still,
> initialize it so we don't have to deal with these warnings again.

Yeah - they have a common pattern that I could understand Coverity not being
able to follow, where it's the default value of another variable that triggers
the early exit, in the case where they are both not set.   Seems safe & simple
enough to just set them as you've done.

Reviewed-by: Alan Coopersmith <alan.coopersmith at oracle.com>

-- 
	-Alan Coopersmith-              alan.coopersmith at oracle.com
	 Oracle Solaris Engineering - http://blogs.oracle.com/alanc