spearmint: Fix compiling Freetype 2.9 on newer macOS

Author: zturtleman

code/freetype-2.9/src/gzip/ftzconf.h

@@ -215,7 +215,7 @@
 #   define FAR
 #endif
 
-#if !defined(MACOS) && !defined(TARGET_OS_MAC)
+#if !defined(__MACTYPES__)
 typedef unsigned char  Byte;  /* 8 bits */
 #endif
 typedef unsigned int   uInt;  /* 16 bits or more */