Fixed:booth fails in realocating a memory
When we set more than 17 tickets, booth causes "segmentation fault".
I add typecasting because the calculation of pointer is incorrect. 

Signed-off-by: Yuichi SEINO <seino.cluster2@gmail.com>
modified the 'rcbooth-arbitrator status' that it should only show
'Running' if a boothd is running in arbitrator mode.

Signed-off-by: Xia Li <xli@suse.com>