Fix:

error: unknown type name 'Fixed'

https://github.com/POV-Ray/povray/issues/479
https://github.com/Homebrew/homebrew-core/commit/70abe4316fc03956b37518d88cf60429e74960bd
--- source/backend/shape/truetype.cpp.orig
+++ source/backend/shape/truetype.cpp
@@ -117,7 +117,7 @@ typedef unsigned int ULONG;
 typedef short FWord;
 typedef unsigned short uFWord;

-#if !defined(TARGET_OS_MAC)
+#if !defined(__MACTYPES__)
 typedef int Fixed;
 #endif