some minor fixes for the classvars stuff

include/tr/class.h

@@ -84,7 +84,7 @@
  * even compile.
  */
 #define TR_EXTENDS(parent)		const char _[sizeof(struct c_##parent)]
-#define TR_CV_EXTENDS(parent)	const char _[sizeof(struct c_##parent##_vars)]
+#define TR_CV_EXTENDS(parent)	struct c_##parent##_vars _
 
 /**
  * Some macros might translate a give NULL to _NULL,
@@ -107,13 +107,13 @@
  * created.
  */
 #define TR_CREATE_CLASS(name,_parent,cvInit,...)            \
-	struct c_##name##_vars c_vars;                          \
+	struct c_##name##_vars _##name##_vars;                  \
     void (* TR_initClassVars##name)(TR_class_ptr) = cvInit;	\
 	static TR_class_ptr _classInit##name##_(void) {         \
+		c_##name.init   = NULL;                             \
 		c_##name.parent = _##_parent;                       \
 		if (TR_initClassVars##name)                         \
 			TR_initClassVars##name(_##name);                \
-		c_##name.init   = NULL;                             \
 		return &c_##name;                                   \
 	};                                                      \
 	struct TR_class c_##name = {                            \
@@ -121,11 +121,11 @@
 		NULL,                                               \
 		sizeof(struct c_##name),                            \
 		_classInit##name##_,                                \
-		&c_vars,                                            \
+		&_##name##_vars,                                    \
 		TR_INIT_IFACE_IMPL(__VA_ARGS__)                     \
 	};                                                      \
 	struct TR_class * const _##name = &c_##name;            \
-	struct c_##name##_vars c_vars
+	struct c_##name##_vars _##name##_vars
 
 /**
  * Create a static instance of a class.
@@ -176,7 +176,10 @@
  * \see TR_CREATE_CLASS
  */
 #define TR_GET_CLASS(object) \
-		(TR_INIT_CLASS(*(TR_class_ptr *)((void*)(object) - sizeof(void*))))
+	(TR_INIT_CLASS(*(TR_class_ptr *)((void*)(object) - sizeof(void*))))
+
+#define TR_CLASS_BY_NAME(class_name)		(TR_INIT_CLASS(& c_##class_name))
+#define TR_CLASS_BY_NAME_STATIC(class_name)	(& c_##class_name)
 
 /**
  * Returns this class's implementations of the interface