filter fix

[lttv.git] / ltt / branches / poly / lttv / lttv / filter.c

diff --git a/ltt/branches/poly/lttv/lttv/filter.c b/ltt/branches/poly/lttv/lttv/filter.c
index 11358657f02e16d9b324ede06c8cb8484a813581..daa00769234964c14c9226f8764d1b46af5d75fd 100644 (file)
--- a/ltt/branches/poly/lttv/lttv/filter.c
+++ b/ltt/branches/poly/lttv/lttv/filter.c
@@ -1042,7 +1042,9 @@ lttv_filter_tree_clone(const LttvFilterTree* tree) {
  */
 LttvFilter*
 lttv_filter_clone(const LttvFilter* filter) {
-    
+ 
+       if(!filter) return NULL;
+
   LttvFilter* newfilter = g_new(LttvFilter,1); 
 
   strcpy(newfilter->expression,filter->expression);
@@ -1486,8 +1488,12 @@ lttv_filter_update(LttvFilter* filter) {
 void
 lttv_filter_destroy(LttvFilter* filter) {
   
-  g_free(filter->expression);
-  lttv_filter_tree_destroy(filter->head);
+       if(!filter) return;
+
+       if(filter->expression)
+         g_free(filter->expression);
+       if(filter->head)
+         lttv_filter_tree_destroy(filter->head);
   g_free(filter);
   
 }