iputils.hh: Consistently use nullptr rather than NULL.

diff --git a/pdns/iputils.hh b/pdns/iputils.hh
index 11525254e2aed517e8f19e298676c73e5bdc4129..9bfb317dfe5ae603713aa848f73371c13c33159d 100644 (file)
--- a/pdns/iputils.hh
+++ b/pdns/iputils.hh
@@ -574,7 +574,7 @@ private:
     */
   class TreeNode : boost::noncopyable {
   public:
-    explicit TreeNode(int bits) noexcept : parent(NULL),d_bits(bits) {
+    explicit TreeNode(int bits) noexcept : parent(nullptr),d_bits(bits) {
     }
 
     //<! Makes a left node with one more bit than parent