GBE: fix a assert when structure argument's first field don't used.
GBE: fix a assert when structure argument's first field don't used.

If use stucture argument's other field but don't use first field, the
argument's curbe payload will not be allocated, cause assert.
Set the maxID to 1 for this case, because each filed deallocate separately.

Signed-off-by: Yang Rong <78759e37dc7114caed18f74e7515c5cb519dbf6d@intel.com>
Reviewed-by: Ruiling Song <286a174c1339c6eff91abc41c3a1012c95030c95@intel.com>

wdv4758h/beignet,wdv4758h/beignet,wdv4758h/beignet,wdv4758h/beignet,wdv4758h/beignet