Make Array::className() support all Array::Type's

Array::className() had fallen out of date with respect to Array::Type.
This commit updates it, and adds documentation and a debug message to
serve as a reminder for future additions of values to Array::Type.

src/osg/Array.cpp

@@ -11,6 +11,7 @@
  * OpenSceneGraph Public License for more details.
 */
 #include <osg/Array>
+#include <osg/Notify>
 
 using namespace osg;
 
@@ -62,13 +63,20 @@ static const char* s_ArrayNames[] =
 
     "MatrixArray",  //33
     "MatrixdArray", //34
+
+    "QuatArray",    //35
+
+    "UInt64Array",  //36
+    "Int64Array",   //37
 };
 
 const char* Array::className() const
 {
-    if (_arrayType>=ArrayType && _arrayType<=Vec4dArrayType)
+    if (_arrayType>=ArrayType && _arrayType<=LastArrayType)
         return s_ArrayNames[_arrayType];
-    else
+    else {
+        OSG_DEBUG << "Array::className(): Unknown array type " << _arrayType << std::endl;
         return "UnknownArray";
+    }
 }