xscale bugfix to handler loading

xscale bugfix to handler loading

Just fill out the rest of the cache line with NOPs; don't change
the record of how much data we consumed.  Otherwise the count of
how much data is left can roll over from positive to negative
("VERY positive") and skip the loop termination of zero.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>