s4-libregistry: Make sure we don't dereference a NULL pointer.

Reviewed-by: David Disseldorp <ddiss@samba.org>

diff --git a/source4/lib/registry/regf.c b/source4/lib/registry/regf.c
index b6a586cf78bd6edad3909761c43edbd219683583..06476b940ee920474e079228a7acd2097420220c 100644 (file)
--- a/source4/lib/registry/regf.c
+++ b/source4/lib/registry/regf.c
@@ -163,7 +163,9 @@ static DATA_BLOB hbin_alloc(struct regf_data *data, uint32_t size,
        struct hbin_block *hbin = NULL;
        unsigned int i;
 
-       *offset = 0;
+       if (offset != NULL) {
+               *offset = 0;
+       }
 
        if (size == 0)
                return data_blob(NULL, 0);