Fix stop function of NFCT plugin.

This patch fixes some crashes in NFCT plugin that were triggered
by the call of the destructor_nfct function (during stop).

1 files changed, 4 insertions, 2 deletions

diff --git a/src/hash.c b/src/hash.c
index 33541e8..700678c 100644
--- a/src/hash.c
+++ b/src/hash.c
@@ -75,8 +75,10 @@ hashtable_create(int hashsize, int limit, int datasize,
 
 void hashtable_destroy(struct hashtable *h)
 {
-	hashtable_flush(h);
-	free(h);
+	if (h) {
+		hashtable_flush(h);
+		free(h);
+	}
 }
 
 void *hashtable_add(struct hashtable *table, void *data)