QStandardPaths/Win: fix build with old MinGW SDK

...that may lack GetCurrentProcessToken. The definition in the new SDKs
is:

  FORCEINLINE HANDLE GetCurrentProcessToken (VOID)
  {
    return (HANDLE)(LONG_PTR) (-4);
  }

This is a partial revert of ae7e11e5c6c0e8e9ae03bb8feecf4bcb2d85d72d.

Pick-to: 6.3
Change-Id: I74249c52dc02478ba93cfffd16d23c487229f95d
Reviewed-by: Yuhang Zhao <2546789017@qq.com>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>

1 files changed, 4 insertions, 2 deletions

diff --git a/src/corelib/io/qstandardpaths_win.cpp b/src/corelib/io/qstandardpaths_win.cpp
index 2ddf4a5fe1..d191ed33b4 100644
--- a/src/corelib/io/qstandardpaths_win.cpp
+++ b/src/corelib/io/qstandardpaths_win.cpp
@@ -92,8 +92,10 @@ static inline void appendTestMode(QString &path)
         path += QLatin1String("/qttest");
 }
 
-static bool isProcessLowIntegrity() {
-    const HANDLE process_token = GetCurrentProcessToken();
+static bool isProcessLowIntegrity()
+{
+    // same as GetCurrentProcessToken()
+    const auto process_token = HANDLE(quintptr(-4));
 
     QVarLengthArray<char,256> token_info_buf(256);
     auto* token_info = reinterpret_cast<TOKEN_MANDATORY_LABEL*>(token_info_buf.data());