[aravis] evaluator: fix token memleaks.

[Emmanuel Pacaud <emmanuel src gnome org>]

commit c122d54932259de0a0b2abc54c083f8ed3fbe80a
Author: Emmanuel Pacaud <emmanuel gnome org>
Date:   Mon Jun 28 13:26:02 2010 +0200

    evaluator: fix token memleaks.
    
    It happened on errors or on right parenthesis.

 src/arvevaluator.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/src/arvevaluator.c b/src/arvevaluator.c
index 5ac4e59..8a443e1 100644
--- a/src/arvevaluator.c
+++ b/src/arvevaluator.c
@@ -881,7 +881,7 @@ parse_expression (char *expression, GSList **rpn_stack)
 					status = ARV_EVALUATOR_STATUS_PARENTHESES_MISMATCH;
 					goto CLEANUP;
 				}
-
+				arv_evaluator_token_free (token);
 				arv_evaluator_token_free (operator_stack->data);
 				operator_stack = g_slist_delete_link (operator_stack, operator_stack);
 			} else {
@@ -910,6 +910,8 @@ parse_expression (char *expression, GSList **rpn_stack)
 
 CLEANUP:
 
+	if (token != NULL)
+		arv_evaluator_token_free (token);
 	for (iter = token_stack; iter != NULL; iter = iter->next)
 		arv_evaluator_token_free (iter->data);
 	g_slist_free (token_stack);