s3/lib/dbwrap: clang: Fix 'Access to field results in a deref of a null'

Fixes:

source3/lib/dbwrap/dbwrap_ctdb.c:530:39: warning: Access to field 'm_write' results in a dereference of a null pointer (loaded from field 'transaction') <--[clang]
        if (pull_newest_from_marshall_buffer(ctx->transaction->m_write, key,

Signed-off-by: Noel Power <noel.power@suse.com>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>

diff --git a/source3/lib/dbwrap/dbwrap_ctdb.c b/source3/lib/dbwrap/dbwrap_ctdb.c
index 33558e442f3b4bd4a7a193e276d565cae06dec55..0e108920f585acbd4e210e1a7ea3b5afccb0638d 100644 (file)
--- a/source3/lib/dbwrap/dbwrap_ctdb.c
+++ b/source3/lib/dbwrap/dbwrap_ctdb.c
@@ -527,6 +527,11 @@ static struct db_record *db_ctdb_fetch_locked_transaction(struct db_ctdb_ctx *ct
        result->storev = db_ctdb_storev_transaction;
        result->delete_rec = db_ctdb_delete_transaction;
 
+       if (ctx->transaction == NULL) {
+               DEBUG(0, ("no transaction available\n"));
+               TALLOC_FREE(result);
+               return NULL;
+       }
        if (pull_newest_from_marshall_buffer(ctx->transaction->m_write, key,
                                             NULL, result, &result->value)) {
                return result;