dnsdist: Fix comparison between signed and unsigned integer

diff --git a/pdns/dnsdist-cache.cc b/pdns/dnsdist-cache.cc
index 3c8b1d2eb4454b0aea28f9a83b9ecb39bb37a058..3e085bd7d9ef27eebfb317577e08d1253f829ba4 100644 (file)
--- a/pdns/dnsdist-cache.cc
+++ b/pdns/dnsdist-cache.cc
@@ -126,7 +126,7 @@ bool DNSDistPacketCache::get(const DNSQuestion& dq, uint16_t consumed, uint16_t
 
     const CacheValue& value = it->second;
     if (value.validity < now) {
-      if ((value.validity + allowExpired) < now) {
+      if ((now - value.validity) >= static_cast<time_t>(allowExpired)) {
         d_misses++;
         return false;
       }