Fixed unnecessary null pointer check.

Signed-off-by: Lucas Baraya <[email protected]>

Author: Luc35b

openvdb_cmd/vdb_view/Viewer.cc

@@ -189,9 +189,11 @@ init(const std::string& progName, bool background)
     if (background) {
         if (sThreadMgr == nullptr) {
             std::lock_guard<std::mutex> lock(sLock);
-            OPENVDB_START_THREADSAFE_STATIC_WRITE
-            sThreadMgr = new ThreadManager;
-            OPENVDB_FINISH_THREADSAFE_STATIC_WRITE
+            if (sThreadMgr == nullptr) {
+                OPENVDB_START_THREADSAFE_STATIC_WRITE
+                sThreadMgr = new ThreadManager;
+                OPENVDB_FINISH_THREADSAFE_STATIC_WRITE
+            }
         }
     } else {
         if (sThreadMgr != nullptr) {