Added osg::getBinding(osg::Array* array) convinience function that returns the Array::getBinding() is the array is not NULL, otherwise returns BIND_OFF.

include/osg/Array

@@ -184,6 +184,10 @@ class OSG_EXPORT Array : public BufferData
         bool    _preserveDataType;
 };
 
+/** convinience function for getting the binding of array via a ptr that may be null.*/
+inline int getBinding(const osg::Array* array) { return array ? array->getBinding() : osg::Array::BIND_OFF; }
+
+
 template<typename T, Array::Type ARRAYTYPE, int DataSize, int DataType>
 class TemplateArray : public Array, public MixinVector<T>
 {