C++11 cleanup.

diff --git a/src/lib/config.cc b/src/lib/config.cc
index b90f028164a2de6d0d95215d91a74c739bf49d3d..463778887af03b05280177ff3e819c5c56f13bf4 100644 (file)
--- a/src/lib/config.cc
+++ b/src/lib/config.cc
@@ -619,7 +619,7 @@ catch (...) {
 Config *
 Config::instance ()
 {
-       if (_instance == 0) {
+       if (_instance == nullptr) {
                _instance = new Config;
                _instance->read ();
        }