Speedup radiotap parser

Scan the radiotap header once per packet thus reducing
the parser complexity from O(n^2) to O(n)
compile fix
Speedup radiotap parser

Scan the radiotap header once per packet thus reducing
the parser complexity from O(n^2) to O(n)

Signed-off-by: Matteo Croce <rootkit85@yahoo.it>
Merge branch 'master' of github.com:teknoraver/click
Merge pull request #101 from teknoraver/master

Speedup radiotap parser