[PATCH] fix return value on MCAST_MSFILTER error case

[Chris Wright <chrisw@xxxxxxxx>]

Return -EINVAL if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen)

===== net/ipv4/ip_sockglue.c 1.22 vs edited =====
--- 1.22/net/ipv4/ip_sockglue.c Mon Mar  8 12:15:03 2004
+++ edited/net/ipv4/ip_sockglue.c       Tue Apr 20 18:00:50 2004
@@ -800,7 +800,7 @@
                                goto mc_msf_out;
                        }
                        if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) {
-                               err = EINVAL;
+                               err = -EINVAL;
                                goto mc_msf_out;
                        }
                        msize = IP_MSFILTER_SIZE(gsf->gf_numsrc);