server/proxy: pf_filters: Update filter_free to accept NULL

diff --git a/server/proxy/pf_filters.c b/server/proxy/pf_filters.c
index 21c120f..774146e 100644 (file)
--- a/server/proxy/pf_filters.c
+++ b/server/proxy/pf_filters.c
@@ -121,7 +121,9 @@ PF_FILTER_RESULT pf_filters_run_by_type(filters_list* list, PF_FILTER_TYPE type,
 
 static void pf_filters_filter_free(proxyFilter* filter)
 {
-       assert(filter != NULL);
+       if (!filter)
+               return;
+
        if (filter->handle)
                FreeLibrary(filter->handle);