The byte count table is only used for aggregation. Updating it
in other cases caused fragmented frames to be dropped.

This fixes http://www.intellinuxwireless.org/bugzilla/show_bug.cgi?id=2004Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>