Fix a memory leak in bridge_interfaces.

[trix_juniper.net]

Summary

The local pointer 'pad' is assigned memory that is freed before bridge_interfaces returns.

Test Plan

Run clang's static analyzer scan-build before to find the problem, run it after to show problem is resolved.

head/sbin/ifconfig/ifbridge.c

if (req->ifbr_ifsflags & IFBIF_STP) {
                         if (req->ifbr_state < nitems(stpstates))
                                 printf(" state %s", stpstates[req->ifbr_state]);
                         else
                                 printf(" <unknown state %d>",
                                     req->ifbr_state);
                 }
                 printf("\n");
         }
-
+        free(pad);
         free(inbuf);
 }
 
 static void
 bridge_addresses(int s, const char *prefix)
 {
         struct ifbaconf ifbac;
         struct ifbareq *ifba;