Merge r3490: Assert that realloc() did.

git-svn-id: http://www.varnish-cache.org/svn/branches/2.0@3680 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/mgt_param.c

@@ -908,6 +908,7 @@ MCF_AddParams(const struct parspec *ps)
 		n++;
 	}
 	parspec = realloc(parspec, (nparspec + n + 1) * sizeof *parspec);
+	XXXAN(parspec);
 	for (pp = ps; pp->name != NULL; pp++)
 		parspec[nparspec++] = pp;
 	parspec[nparspec] = NULL;