If key is 4 that is an array out of bounds.
Reported-by: NDan Carpenter <error27@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

If the value read from HERMES_RID_TXQUEUEEMPTY becomes 0 after exactly
100 readings, we wrongly consider it a timeout.  Rewrite the clever
while loop as a for loop that does the right thing and looks simpler.

Reported by Juha Leppanen <juha_motorsportcom@luukku.com>
Signed-off-by: NPavel Roskin <proski@gnu.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

No functional change.
Signed-off-by: NDavid Kilroy <kilroyd@googlemail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>