Refactor the repeat command

Code duplication has been eliminated by calling update_rept() from the
repeat command ui_day_item_repeat().

The repeat command asks for simple or advanced repetition.

Signed-off-by: Lars Henriksen <LarsHenriksen@get2net.dk>
Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>

src/recur.c

@@ -392,8 +392,7 @@ char recur_def2char(enum recur_type define)
 		recur_char = 'Y';
 		break;
 	default:
-		EXIT(_("unknown repetition type"));
-		return 0;
+		recur_char = 0;
 	}
 
 	return recur_char;