fix typo in cause of a thrown exception

alib2xml/src/core/xmlApi.hpp

@@ -118,7 +118,7 @@ public:
 			std::string groupName = ext::to_string < object::Object > ( );
 			std::string typeName = ext::to_string < Type > ( );
-			throw::exception::CommonException ( "Parse callback of " + typeName + " already registered in group " + groupName + "." );
+			throw::exception::CommonException ( "Compose callback of " + typeName + " already registered in group " + groupName + "." );
 		}
 	}