table: fix lookup with incomplete bitmask

table: fix lookup with incomplete bitmask

When a lookup was done on a table_array structure with an incomplete
bitmask, the results was always zero hits. This was because the
pkts_mask value was cleared as we process each entry, and the result
was assigned at the end of the loop, when pkts_mask was zero.
Changing the assignment to occur at the start, before the pkts_mask
gets cleared, fixes this issue.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Acked by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>