[PATCH] migration/qemu-file: Fix maybe uninitialized on qemu_get_buffer_in_place()

[Wainer dos Santos Moschetta]

Fixed error when compiling migration/qemu-file.c with 
-Werror=maybe-uninitialized
as shown here:

../migration/qemu-file.c: In function 'qemu_get_buffer_in_place':
../migration/qemu-file.c:604:18: error: 'src' may be used uninitialized in this 
function [-Werror=maybe-uninitialized]
  604 |             *buf = src;
      |             ~~~~~^~~~~
cc1: all warnings being treated as errors

Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com>
---
Passed on CI: https://gitlab.com/wainersm/qemu/-/pipelines/247801576

 migration/qemu-file.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/migration/qemu-file.c b/migration/qemu-file.c
index be21518c57..d6e03dbc0e 100644
--- a/migration/qemu-file.c
+++ b/migration/qemu-file.c
@@ -595,7 +595,7 @@ size_t qemu_get_buffer_in_place(QEMUFile *f, uint8_t **buf, 
size_t size)
 {
     if (size < IO_BUF_SIZE) {
         size_t res;
-        uint8_t *src;
+        uint8_t *src = NULL;
 
         res = qemu_peek_buffer(f, &src, size, 0);
 
-- 
2.28.0