convert $endif to callbacks.print

src/conky.c

@@ -804,9 +804,6 @@ void generate_text_internal(char *p, int p_max_size,
 				need_to_load_fonts = 1;
 			}
 #endif /* X11 */
-			OBJ(endif) {
-				/* harmless object, just ignore */
-			}
 			OBJ(pid_chroot) {
 				char buf[max_user_text];
 

src/core.c

@@ -547,6 +547,7 @@ struct text_object *construct_text_object(const char *s, const char *arg, long
 		obj->callbacks.iftest = &gen_false_iftest;
 	END OBJ(endif, 0)
 		obj_be_ifblock_endif(ifblock_opaque, obj);
+		obj->callbacks.print = &gen_print_nothing;
 	END OBJ(eval, 0)
 		obj->data.s = strndup(arg ? arg : "", text_buffer_size);
 		obj->callbacks.print = &print_evaluate;

src/text_object.c

@@ -43,6 +43,13 @@ int gen_false_iftest(struct text_object *obj)
 	return 0;
 }
 
+void gen_print_nothing(struct text_object *obj, char *p, int p_max_size)
+{
+	(void)obj;
+	(void)p;
+	(void)p_max_size;
+}
+
 /* text_object_list
  *
  * this list is special. it looks like this:

src/text_object.h

@@ -497,6 +497,10 @@ void gen_free_opaque(struct text_object *);
  * used for the else object */
 int gen_false_iftest(struct text_object *);
 
+/* generic nothing printer callback printing nothing
+ * used for the endif object */
+void gen_print_nothing(struct text_object *, char *, int);
+
 struct text_object {
 	struct text_object *next, *prev;	/* doubly linked list of text objects */
 	struct text_object *sub;		/* for objects parsing text into objects */