Use nullptr instead of zero (0) as the null pointer constant

1 files changed, 1 insertions, 1 deletions

diff --git a/src/sync.cpp b/src/sync.cpp
index b82f3770e4..9c351ea487 100644
--- a/src/sync.cpp
+++ b/src/sync.cpp
@@ -162,7 +162,7 @@ void DeleteLock(void* cs)
         return;
     }
     boost::unique_lock<boost::mutex> lock(lockdata.dd_mutex);
-    std::pair<void*, void*> item = std::make_pair(cs, (void*)0);
+    std::pair<void*, void*> item = std::make_pair(cs, nullptr);
     LockOrders::iterator it = lockdata.lockorders.lower_bound(item);
     while (it != lockdata.lockorders.end() && it->first.first == cs) {
         std::pair<void*, void*> invitem = std::make_pair(it->first.second, it->first.first);