extstore: fix some valgrind errors.

1 files changed, 1 insertions, 0 deletions

diff --git a/storage.c b/storage.c
index a9ca028..6c34d12 100644
--- a/storage.c
+++ b/storage.c
@@ -458,6 +458,7 @@ static void *storage_compact_thread(void *arg) {
     wrap.done = false;
     wrap.submitted = false;
     wrap.io.data = &wrap;
+    wrap.io.iov = NULL;
     wrap.io.buf = (void *)readback_buf;
 
     wrap.io.len = settings.ext_wbuf_size;