utils/aggregrate.c: default aggregration precision should be max + 2.
utils/aggregrate.c: default aggregration precision should be max + 2.

I played and tested this versus 1 versus 0 and I think that 2 is the best that we want to do.
This covers the 1/3 or 2/3 cases very nicely.

@Jeremy for approval/signoff.


git-svn-id: 036a1c5f902f528d79fbac72fb947c91fe594755@223 9f305d85-0c50-0410-b3e0-65f4174694de

dbushong/crush-tools,dbushong/crush-tools,dbushong/crush-tools,dbushong/crush-tools