ICWrap.c dereferences the xim parameter passed in from client code without a
NULL check.  I have seen mplayer trigger this resulting in a segfault.  In this
case mplayer had called XOpenIM and NULL was returned which was later passed
into XCreateIC.

Patch originally by Drew Moseley <drew_moseley@mentor.com>.
Signed-off-by: Ross Burton <ross.burton@intel.com>
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>