option to build the BGE without python, uses existing python check (cmake and scons)

when python is disabled videotextures are not built.

source/gameengine/Converter/KX_ConvertProperties.cpp

@@ -130,7 +130,7 @@ void BL_ConvertProperties(Object* object,KX_GameObject* gameobj,SCA_TimeEventMan
 			propval->Release();
 		}
 		
-		
+#ifndef DISABLE_PYTHON
 		/* Warn if we double up on attributes, this isnt quite right since it wont find inherited attributes however there arnt many */
 		for(PyAttributeDef *attrdef = KX_GameObject::Attributes; attrdef->m_name; attrdef++) {
 			if(strcmp(prop->name, attrdef->m_name)==0) {
@@ -145,6 +145,7 @@ void BL_ConvertProperties(Object* object,KX_GameObject* gameobj,SCA_TimeEventMan
 			}
 		}
 		/* end warning check */
+#endif // DISABLE_PYTHON
 
 		prop = prop->next;
 	}