qemu-img: decrease progress update interval on convert

when doing very large jobs updating the progress only every 2%
is too rare.

Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

qemu-img.c

@@ -1245,7 +1245,7 @@ static int img_convert(int argc, char **argv)
     out_filename = argv[argc - 1];
 
     /* Initialize before goto out */
-    qemu_progress_init(progress, 2.0);
+    qemu_progress_init(progress, 1.0);
 
     if (options && is_help_option(options)) {
         ret = print_block_option_help(out_filename, out_fmt);