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

@@ -280,13 +280,13 @@
  *
  * \see TR_CALL
  */
-#define TR_PARENTCALL(object,_iface,method,...)         \
-	do {                                                \
-		struct i_##_iface * iface;                      \
-		TR_class_ptr pc_class = TR_GET_CLASS((object)); \
-		assert(TR_HAS_PARENT(pc_class));                \
-		_TR_CALL(pc_class->parent, _iface, method);     \
-		iface->method(object, ##__VA_ARGS__);           \
+#define TR_PARENTCALL(class, object,_iface,method,...)   \
+	do {                                                 \
+		struct i_##_iface * iface;                       \
+		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__);            \
 	} while(0)
 
 /*
@@ -295,13 +295,13 @@
  *
  * \see TR_RETCALL
  */
-#define TR_PARENTRETCALL(object,_iface,method,ret,...)  \
-	do {                                                \
-		struct i_##_iface * iface;                      \
-		TR_class_ptr pc_class = TR_GET_CLASS((object)); \
-		assert(TR_HAS_PARENT(pc_class));                \
-		_TR_CALL(pc_class->parent, _iface, method);     \
-		ret = iface->method(object, ##__VA_ARGS__);     \
+#define TR_PARENTRETCALL(class, object,_iface,method,ret,...) \
+	do {                                                      \
+		struct i_##_iface * iface;                            \
+		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__);           \
 	} while(0)