migration/qemu-file.c: Don't shift left into sign bit

Add a cast in qemu_get_be32() to avoid shifting left into the sign
bit of a signed integer (which is undefined behaviour in C).

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

diff --git a/migration/qemu-file.c b/migration/qemu-file.c
index d2d40073f04f2edd6777c4b506b6b6eabef9b6e2..a7f2a344305ca3edc2bbf1d7e6e9f16ff5dbdd9e 100644 (file)
--- a/migration/qemu-file.c
+++ b/migration/qemu-file.c
@@ -503,7 +503,7 @@ unsigned int qemu_get_be16(QEMUFile *f)
 unsigned int qemu_get_be32(QEMUFile *f)
 {
     unsigned int v;
-    v = qemu_get_byte(f) << 24;
+    v = (unsigned int)qemu_get_byte(f) << 24;
     v |= qemu_get_byte(f) << 16;
     v |= qemu_get_byte(f) << 8;
     v |= qemu_get_byte(f);