Moved the intialization variable reset to end of the init funciton to

avoid multi-thread initialization from producing different results.

src/osg/Notify.cpp

@@ -39,8 +39,6 @@ bool osg::initNotifyLevel()
 
     if (s_NotifyInit) return true;
     
-    s_NotifyInit = true;
-
     // g_NotifyLevel
     // =============
 
@@ -73,6 +71,8 @@ bool osg::initNotifyLevel()
  
     }
 
+    s_NotifyInit = true;
+
     return true;
 
 }