[Fix] mpt/base/detect_os.hpp: Fix typo. Broken since r24835.

git-svn-id: https://source.openmpt.org/svn/openmpt/trunk/OpenMPT@24839 56274372-70c3-4bfc-bfc3-4c3a0b034d27

Author: manxorist

src/mpt/base/detect_os.hpp

@@ -375,7 +375,7 @@ static_assert(NTDDI_WIN11_GE == MPT_WIN_11_24H2);
 #define MPT_OS_WINDOWS_WIN32 0
 // for Win9x, we encode the IE version in the lowest byte
 #if defined(_WIN32_IE)
-#define MPT_WIN_VERSION      ((_WIN32_WINDOWS << 16)) | ((_WIN32_IE & 0xffff) >> 6))
+#define MPT_WIN_VERSION      ((_WIN32_WINDOWS << 16)) | ((_WIN32_IE & 0xffff) >> 8))
 #else
 #define MPT_WIN_VERSION (_WIN32_WINDOWS << 16)
 #endif