Added an InitRegistry static intiialization and destrucion static to help control the order of construction and destruction of the osgDB::Registry.

git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14461 16af8721-9629-0410-8352-f15c8da7e697

src/osgViewer/ViewerBase.cpp

@@ -25,6 +25,8 @@
 #include <osg/TexMat>
 #include <osg/DeleteHandler>
 
+#include <osgDB/Registry>
+
 #include <osgUtil/Optimizer>
 #include <osgUtil/IntersectionVisitor>
 #include <osgUtil/Statistics>
@@ -38,6 +40,23 @@ static osg::ApplicationUsageProxy ViewerBase_e5(osg::ApplicationUsage::ENVIRONME
 
 using namespace osgViewer;
 
+
+struct InitRegistry
+{
+    InitRegistry()
+    {
+        osgDB::Registry::instance();
+    }
+
+    ~InitRegistry()
+    {
+        osgDB::DatabasePager::prototype() = 0;
+        osgDB::Registry::instance(true);
+    }
+};
+
+static InitRegistry s_InitRegistry;
+
 ViewerBase::ViewerBase():
     osg::Object(true)
 {