casa-mp-base

Fix build failure with Clangs from Xcode 7 and earlier.

This has been reported to the developer by email.

--- misc/consts.h.orig  2019-02-22 19:36:36.000000000 -0600

+++ misc/consts.h   2019-10-09 05:57:18.000000000 -0500

@@ -345,7 +345,7 @@

 #define MIN_STORED_TIME_VALUE  ( YEARS_TO_SECONDS( 1995 - 1970 ) )

 #define MAX_TIME_VALUE         ( YEARS_TO_SECONDS( 2036 - 1970 ) )

-#if ( defined( __clang__ ) && ( __clang_major__ > 5 ) ) || \

+#if ( defined( __clang__ ) && ( ( __clang_major__ > 5 && !defined(__apple_build_version__) ) || __apple_build_version__ >= 8000000 ) ) || \

    ( defined( __GNUC__ ) && ( __GNUC__ > 6 ) ) || \

    ( defined( _MSC_VER ) && VC_GE_2017( _MSC_VER ) )

   #define CURRENT_TIME_VALUE   ( ( DATE_YEAR + DATE_MONTH + DATE_DAY - 30 ) * 86400 )