[PULL 2/3] qga/vss-win32: fix compilation with clang++

[Paolo Bonzini <pbonzini@redhat.com>]

From: Helge Konetzka <hk@zapateado.de>

This fixes:

qga/vss-win32/install.cpp:49:24: error: cannot initialize a variable of
type 'char *' with an rvalue of type 'const char *'
    char *msg = NULL, *nul = strchr(text, '(');
                       ^     ~~~~~~~~~~~~~~~~~

Signed-off-by: Helge Konetzka <hk@zapateado.de>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Konstantin Kostiuk <kkostiuk@redhat.com>
Message-Id: <39400817-3dc9-516d-9096-bc1f68862531@zapateado.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 qga/vss-win32/install.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/qga/vss-win32/install.cpp b/qga/vss-win32/install.cpp
index 8076efe3cb..b57508fbe0 100644
--- a/qga/vss-win32/install.cpp
+++ b/qga/vss-win32/install.cpp
@@ -46,7 +46,8 @@ void errmsg(DWORD err, const char *text)
      * If text doesn't contains '(', negative precision is given, which is
      * treated as though it were missing.
      */
-    char *msg = NULL, *nul = strchr(text, '(');
+    char *msg = NULL;
+    const char *nul = strchr(text, '(');
     int len = nul ? nul - text : -1;
 
     FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
-- 
2.35.1