generic: fix NLA comparison #2
generic: fix NLA comparison #2

Thanks to https://github.com/polachok

Bug-url: https://github.com/svinota/pyroute2/issues/32

simudream/pyroute2,tomislacker/python-iproute2,nazarewk/pyroute2,little-dude/pyroute2,nazarewk/pyroute2,little-dude/pyroute2,drzaeus77/pyroute2,little-dude/pyroute2,tomislacker/python-iproute2,simudream/pyroute2,roolebo/pyroute2,mtiny/pyroute2,mtiny/pyroute2,vodik/pyroute2,nazarewk/pyroute2,roolebo/pyroute2,drzaeus77/pyroute2,vodik/pyroute2