Add IMeshBuffer::getType

Allows to find out which class a meshbuffer has.
I used the same kind of style as ISceneNode::getType. So using four CC codes and virtual functions (instead of type variable).

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@6330 dfc29bdd-3216-0410-991c-e03cc46cb475

include/IMeshBuffer.h

@@ -12,6 +12,7 @@
 #include "SVertexIndex.h"
 #include "EHardwareBufferFlags.h"
 #include "EPrimitiveTypes.h"
+#include "EMeshBufferTypes.h"
 
 namespace irr
 {
@@ -176,6 +177,14 @@ namespace scene
 			return 0;
 		}
 
+		//! Returns type of the class implementing the IMeshBuffer
+		/** \return The class type of this meshbuffer. */
+		virtual EMESH_BUFFER_TYPE getType() const
+		{
+			return EMBT_UNKNOWN;
+		}
+
+
 	};
 
 } // end namespace scene