another case where bad things would happen after wrterror

src/lib/libc/stdlib/malloc.c

@@ -1,4 +1,4 @@
-/*	$OpenBSD: malloc.c,v 1.178 2015/12/30 06:01:18 tedu Exp $	*/
+/*	$OpenBSD: malloc.c,v 1.179 2015/12/30 06:04:39 tedu Exp $	*/
 /*
  * Copyright (c) 2008, 2010, 2011 Otto Moerbeek <otto@drijf.net>
  * Copyright (c) 2012 Matthew Dempsky <matthew@openbsd.org>
@@ -1919,8 +1919,10 @@ malloc_dump(int fd)
 		if (p == NULL)
 			continue;
 		r = find(pool, p);
-		if (r == NULL)
+		if (r == NULL) {
 			wrterror("bogus pointer in malloc_dump", p);
+			continue;
+		}
 		free_bytes(pool, r, p);
 		pool->delayed_chunks[i] = NULL;
 	}