utils_dns.c: unsigned variable can't be negative

diff --git a/src/utils_dns.c b/src/utils_dns.c
index dfced5c..a1e4222 100644 (file)
--- a/src/utils_dns.c
+++ b/src/utils_dns.c
@@ -291,7 +291,7 @@ rfc1035NameUnpack(const char *buf, size_t sz, off_t * off, char *name, size_t ns
     static int loop_detect = 0;
     if (loop_detect > 2)
        return 4;               /* compression loop */
-    if (ns <= 0)
+    if (ns == 0)
        return 4;               /* probably compression loop */
     do {
        if ((*off) >= ((off_t) sz))