since ieee80211_input() can be called by ieee80211_input_all(), we need to check...

since ieee80211_input() can be called by ieee80211_input_all(), we need to check that we are not
updating statistics of all known nodes for every inbound packet for an unknown node.

Merging this fix back from DFS branch, found by Benoit.
-gThis line, and those below, will be ignored--

M    ieee80211_input.c

git-svn-id: http://madwifi-project.org/svn/madwifi/trunk@2882 0192ed92-7a03-0410-a25b-9323aeb14dbd