stream_filter: smooth: useless code cleanup

modules/stream_filter/smooth/utils.c

@@ -97,9 +97,8 @@ chunk_t *chunk_New( sms_stream_t* sms, uint64_t duration,\
 
 void chunk_Free( chunk_t *chunk )
 {
-    if( chunk->data )
-        FREENULL( chunk->data );
-    FREENULL( chunk );
+    free( chunk->data );
+    free( chunk );
 }
 
 sms_stream_t * sms_New( void )
@@ -175,10 +174,10 @@ void sms_queue_free( sms_queue_t* queue )
     while( item )
     {
         next = item->next;
-        FREENULL( item );
+        free( item );
         item = next;
     }
-    FREENULL( queue );
+    free( queue );
 }
 
 int sms_queue_put( sms_queue_t *queue, const uint64_t value )