[PULL 1/1] qga/vss-win32: fix warning for clang++-15

[Konstantin Kostiuk]

From: Pierrick Bouvier <pierrick.bouv...@linaro.org>

Reported when compiling with clang-windows-arm64.

../qga/vss-win32/install.cpp:537:9: error: variable 'hr' is used uninitialized 
whenever 'if' condition is false [-Werror,-Wsometimes-uninitialized]
    if (!(ControlService(service, SERVICE_CONTROL_STOP, NULL))) {
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../qga/vss-win32/install.cpp:545:12: note: uninitialized use occurs here
    return hr;
           ^~

Signed-off-by: Pierrick Bouvier <pierrick.bouv...@linaro.org>
Fixes: 917ebcb170 ("qga-win: Fix QGA VSS Provider service stop failure")
Reviewed-by: Konstantin Kostiuk <kkost...@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <phi...@linaro.org>
Signed-off-by: Kostiantyn Kostiuk <kostyan...@live.com>
---
 qga/vss-win32/install.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/qga/vss-win32/install.cpp b/qga/vss-win32/install.cpp
index b57508fbe0..b8087e5baa 100644
--- a/qga/vss-win32/install.cpp
+++ b/qga/vss-win32/install.cpp
@@ -518,7 +518,7 @@ namespace _com_util
 /* Stop QGA VSS provider service using Winsvc API  */
 STDAPI StopService(void)
 {
-    HRESULT hr;
+    HRESULT hr = S_OK;
     SC_HANDLE manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
     SC_HANDLE service = NULL;
 
-- 
2.25.1