fix PARENTCALL. We need the current class context to find the right parent.

include/tr/class.h

@@ -280,10 +280,10 @@
  *
  * \see TR_CALL
  */
-#define TR_PARENTCALL(object,_iface,method,...)         \
+#define TR_PARENTCALL(class, object,_iface,method,...)   \
 	do {                                                 \
 		struct i_##_iface * iface;                       \
-		TR_class_ptr pc_class = TR_GET_CLASS((object)); \
+		TR_class_ptr pc_class = TR_CLASS_BY_NAME(class); \
 		assert(TR_HAS_PARENT(pc_class));                 \
 		_TR_CALL(pc_class->parent, _iface, method);      \
 		iface->method(object, ##__VA_ARGS__);            \
@@ -295,10 +295,10 @@
  *
  * \see TR_RETCALL
  */
-#define TR_PARENTRETCALL(object,_iface,method,ret,...)  \
+#define TR_PARENTRETCALL(class, object,_iface,method,ret,...) \
 	do {                                                      \
 		struct i_##_iface * iface;                            \
-		TR_class_ptr pc_class = TR_GET_CLASS((object)); \
+		TR_class_ptr pc_class = TR_CLASS_BY_NAME(class);      \
 		assert(TR_HAS_PARENT(pc_class));                      \
 		_TR_CALL(pc_class->parent, _iface, method);           \
 		ret = iface->method(object, ##__VA_ARGS__);           \