Introduce isWindowsVistaOrGreater() as replacement of windowsVersion()

Source/platform/win/SystemInfo.cpp

Index: Source/platform/win/SystemInfo.cpp
diff --git a/Source/platform/win/SystemInfo.cpp b/Source/platform/win/SystemInfo.cpp
index 553f27e076591ccc24b19447836c0bb62848f456..e3016ab68027f1137bd222d196380f84e8040170 100644
--- a/Source/platform/win/SystemInfo.cpp
+++ b/Source/platform/win/SystemInfo.cpp
@@ -41,7 +41,15 @@ WindowsVersion windowsVersion(int* major, int* minor)
         OSVERSIONINFOEX versionInfo;
         ZeroMemory(&versionInfo, sizeof(versionInfo));
         versionInfo.dwOSVersionInfoSize = sizeof(versionInfo);
+#ifdef _WIN32_WINNT_WINBLUE
+// Since Win SDK 8.1, GetVersionEx() is deprecated.
+#pragma warning(push)
+#pragma warning(disable: 4996)
+#endif
         GetVersionEx(reinterpret_cast<OSVERSIONINFO*>(&versionInfo));

[yukawa, 2013/10/24 11:35:38]

Just FYI, you can also suppress warning only in one line as follows.  It's up to
you guys though.
#pragma warning(suppress:4996)  // deprecated in Win 8.1+
        GetVersionEx(reinterpret_cast<OSVERSIONINFO*>(&versionInfo));

+#ifdef _WIN32_WINNT_WINBLUE
+#pragma warning(pop)
+#endif
         majorVersion = versionInfo.dwMajorVersion;
         minorVersion = versionInfo.dwMinorVersion;