Fix I/O leakage. We're cloning bios in g_stripe_start_fast(), but when something goes wrong while running in "fast" mode, we free all bios and falling back to "economic" mode. Freeing bios, doesn't mean decrease bio_children, so bio_inbed couldn't be equal to bio_children and request was never finished. Decrease bio_children manually when destroying bios.
Fix I/O leakage. We're cloning bios in g_stripe_start_fast(), but when
something goes wrong while running in "fast" mode, we free all bios and
falling back to "economic" mode. Freeing bios, doesn't mean decrease
bio_children, so bio_inbed couldn't be equal to bio_children and request
was never finished.
Decrease bio_children manually when destroying bios.

Reported by:	Sam Lawrance <boris@brooknet.com.au>, simon

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase