David Brownell <david-b@pacbell.net> Remove duplicate check for flash write status.

Via code review by Steve Grubb <sgrubb@redhat.com> 

Also minor fixes for the message from "fill":  the byte
count is unsigned, not signed; and more importantly,
print the real number of bytes written

git-svn-id: svn://svn.berlios.de/openocd/trunk@2652 b42882b7-edfa-0310-969c-e2dbd0fdcd60