Make ftgrays.c compile stand-alone again.

* src/smooth/ftgrays.c [_STANDALONE_]: Include `stddef.h'.
(FT_INT_MAX, FT_PtrDist)[_STANDALONE_]: Define.

ChangeLog

@@ -1,3 +1,10 @@
+2010-07-03  Werner Lemberg  <wl@gnu.org>
+
+	Make ftgrays.c compile stand-alone again.
+
+	* src/smooth/ftgrays.c [_STANDALONE_]: Include `stddef.h'.
+	(FT_INT_MAX, FT_PtrDist)[_STANDALONE_]: Define.
+
 2010-07-02  suzuki toshiya  <mpsuzuki@hiroshima-u.ac.jp>
 
 	Additional fix for Savannah bug #30306.

src/smooth/ftgrays.c

@@ -103,10 +103,12 @@
 #include <stdarg.h>
 #endif
 
+#include <stddef.h>
 #include <string.h>
 #include <setjmp.h>
 #include <limits.h>
 #define FT_UINT_MAX  UINT_MAX
+#define FT_INT_MAX   INT_MAX
 
 #define ft_memset   memset
 
@@ -114,6 +116,8 @@
 #define ft_longjmp  longjmp
 #define ft_jmp_buf  jmp_buf
 
+typedef ptrdiff_t  FT_PtrDist;
+
 
 #define ErrRaster_Invalid_Mode      -2
 #define ErrRaster_Invalid_Outline   -1