qemu-img bench: Fix uninitialised writethrough mode

If no -t option is specified, bool writethrough stayed uninitialised.
Initialise it as false, which makes cache=writeback the default cache
mode.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/qemu-img.c b/qemu-img.c
index 251386b49d..14e2661a5c 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -3570,7 +3570,7 @@ static int img_bench(int argc, char **argv)
     BlockBackend *blk = NULL;
     BenchData data = {};
     int flags = 0;
-    bool writethrough;
+    bool writethrough = false;
     struct timeval t1, t2;
     int i;