diff --git a/[refs] b/[refs]
index fff27ba5dae1..e8233e67419e 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 5a75983eef1193c43caebde6643a218bd8d8390e
+refs/heads/master: 0b030c2c2f0f1d98d5fe412e5b7cf7fd53f5221a
diff --git a/trunk/lib/bitmap.c b/trunk/lib/bitmap.c
index 26ebafa8c41d..2c9242e3fed0 100644
--- a/trunk/lib/bitmap.c
+++ b/trunk/lib/bitmap.c
@@ -469,6 +469,10 @@ int bitmap_scnlistprintf(char *buf, unsigned int buflen,
 	/* current bit is 'cur', most recently seen range is [rbot, rtop] */
 	int cur, rbot, rtop;
 
+	if (buflen == 0)
+		return 0;
+	buf[0] = 0;
+
 	rbot = cur = find_first_bit(maskp, nmaskbits);
 	while (cur < nmaskbits) {
 		rtop = cur;