Merged revision(s) 22607 from trunk/OpenMPT:

[Fix] mpt/base/detect_quirks.hpp: Be more defensive with macOS target version check for older XCode.
........


git-svn-id: https://source.openmpt.org/svn/openmpt/branches/OpenMPT-1.30@22612 56274372-70c3-4bfc-bfc3-4c3a0b034d27

src/mpt/base/detect_quirks.hpp

@@ -138,12 +138,16 @@
 #if MPT_OS_MACOSX_OR_IOS
 #if defined(TARGET_OS_OSX)
 #if TARGET_OS_OSX
+#if !defined(MAC_OS_X_VERSION_10_15)
+#define MPT_LIBCXX_QUIRK_NO_TO_CHARS_INT
+#else
 #if (MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_15)
 #define MPT_LIBCXX_QUIRK_NO_TO_CHARS_INT
 #endif
 #endif
 #endif
 #endif
+#endif