top: when did scale_mem parm lose 'unsigned' qualifier

top: when did scale_mem parm lose 'unsigned' qualifier

Well, for some strange unknown reason it happened in a
commit referenced below. But this patch reverts it and
puts this newlib scale_mem on par with the master guy.

[ a little more research reveals that it should have ]
[ been reverted in the 2nd commit shown. that's when ]
[ types were fixed after XTRA_PROCPS_DEBUG was used. ]

Reference(s):
. when 'unsigned' qualifier lost
commit 911083bf76783bcb0052d3d6641753107539d4ec
. when 'unsigned' qualifier not restored
commit 105058ae2dbd89aa5e2f327d819a143f3ab65186
. when XTRA_PROCPS_DEBUG validation introduced
commit e3270d463de7eebd9f5ae20c85495e3cb5b69a9f

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