w: abolish 1 of 2 '-Wmaybe-uninitialized' gcc warnings

There was also a warning regarding the 'u' variable at
line 854, but that one appears to be an erroneous one.

[ warning was enabled with that '-Wextra' gcc option ]

Referencxe(s):
warning: 'jcpu' may be used uninitialized

Signed-off-by: Jim Warner <james.warner@comcast.net>