$OpenBSD: patch-calgebra_main_cpp,v 1.1.1.1 2013/04/24 11:21:42 zhuk Exp $
--- calgebra/main.cpp.orig	Thu Nov 17 22:00:47 2011
+++ calgebra/main.cpp	Fri Jun 29 16:06:51 2012
@@ -152,7 +152,13 @@ int main(int argc, char *argv[])
 	for(int i=0; i<history_get_history_state()->length; i++) {
 		HIST_ENTRY *he = remove_history(i);
 // 		free(he->line);
+#if defined(__OpenBSD__)
+		// very old lib!
+		free(he->line);
+		free(he);
+#else
 		free_history_entry(he);
+#endif
 	}
 	qDebug("\nExit.");
 	return 0;
