qemu-img: Remove redundancy "ret = -1"

In this case, 'ret' is already '-1', so need not do it again.

Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

qemu-img.c

diff --git a/qemu-img.c b/qemu-img.c
index c98896b..d4518e7 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -246,7 +246,6 @@
             if (errno == EAGAIN || errno == EINTR) {
                 continue;
             } else {
-                ret = -1;
                 break;
             }
         } else if (ret == 0) {