Fixed bug in USE_FLOOD Macro that didn't properly update the slot we're supposed to be writing into.

Test is 10k floods of 32 messages. BetaModule1 uses slow math (Imul/divu) while beta2 is using the fast math (and shl)

Test1:
Apr  3 13:42:01 localhost kernel: [  487.326686] MIN    MAX     AVG     MEDIAN
Apr  3 13:42:01 localhost kernel: [  487.329795] 3244 & 144184 & 3728 & 3692
Median time normalized per msg:115 cycles

Test2:
Apr  3 13:43:41 localhost kernel: [  587.197275] MIN    MAX     AVG     MEDIAN
Apr  3 13:43:41 localhost kernel: [  587.200322] 4476 & 318180 & 4888 & 4794
Median time noramlized per msg:149cycles

Test3:
Apr  3 13:44:14 localhost kernel: [  620.868921] MIN    MAX     AVG     MEDIAN
Apr  3 13:44:14 localhost kernel: [  620.872026] 4176 & 156498 & 4613 & 4511
Median time normalized per msg:140Cycles

Signed-off-by: Scotty Bauer <sbauer@eng.utah.edu>