* deprecated.scm (make-uniform-array): Don't pass the prototype as

* deprecated.scm (make-uniform-array): Don't pass the prototype as
the fill value, dimensions->uniform-array will do the right thing
now.  See scm_dimensions_to_uniform_array why we need to be tricky
about the fill value.

* unif.c (scm_dimensions_to_uniform_array): Use the prototype for
filling when the fill parameter is omitted, as documented, but
turn #\nul into 0 since s8 arrays (signified by a #\nul prototype)
can not store characters.