rdma: Don't pass garbage to rd_check_is_filtered()
Variables 'src_port' and 'dst_port' are initialized only if attributes
RDMA_NLDEV_ATTR_RES_SRC_ADDR or RDMA_NLDEV_ATTR_RES_DST_ADDR are
present. Make sure to pass them over to rd_check_is_filtered() only if
that is the case.
Fixes: 9a362cc71a455 ("rdma: Add CM_ID resource tracking information") Signed-off-by: Phil Sutter <phil@nwl.cc> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>