arcmsr: clear CCB allocated on the stack

[trasz]

(Tinderboxed.)

sys/dev/arcmsr/arcmsr.c

#undef NELEM
         p(icp6s_badna, "\t{:bad-neighbor-advertisement/%ju} "
             "{N:/bad neighbor advertisement message%s}\n");
         p(icp6s_badrs, "\t{:bad-router-solicitation/%ju} "
             "{N:/bad router solicitation message%s}\n");
         p(icp6s_badra, "\t{:bad-router-advertisement/%ju} "
             "{N:/bad router advertisement message%s}\n");
         p(icp6s_badredirect, "\t{:bad-redirect/%ju} "
             "{N:/bad redirect message%s}\n");
+        p(icp6s_overflowdefrtr, "\t{:default-routers-overflows/%ju} "
+            "{N:/default routers overflow%s}\n");
+        p(icp6s_overflowprfx, "\t{:prefixes-overflows/%ju} "
+            "{N:/prefix overflow%s}\n");
+        p(icp6s_overflownndp, "\t{:neighbour-entries-overflows/%ju} "
+            "{N:/neighbour entries overflow%s}\n");
+        p(icp6s_overflowredirect, "\t{:redirect-overflows/%ju} "
+            "{N:/redirect overflow%s}\n");
         xo_close_container("errors");
         p(icp6s_pmtuchg, "\t{:path-mtu-changes/%ju} {N:/path MTU change%s}\n");
 #undef p
 #undef p_5
         xo_close_container(name);
 }
 
 /*