message: Fix MAX_C macros
diff: #define INT8_MAX 0x7F
  typedef signed char int8_t;
  -#define UINT8_C(value) ((uint8_t) __CONCAT(value, U))
  +#define UINT8_C(value) ((uint8_t) value ## U)
  #define UINT8_MIN 0x00
  #define UINT8_MAX 0xFF
  typedef unsigned char uint8_t;
  @@ -16,37 +16,37 @@ typedef unsigned char uint8_t;
  #define INT16_MAX 0x7FFF
  typedef signed short int16_t;
  -#define UINT16_C(value) __CONCAT(value, U)
  +#define UINT16_C(value) value ## U
  #define UINT16_MIN 0x0000
  #define UINT16_MAX 0xFFFF
  typedef unsigned short uint16_t;
  -#define INT32_C(value) __CONCAT(value, L)
  +#define INT32_C(value) value ## L
  #define INT32_MIN -0x80000000
  #define INT32_MAX 0x7FFFFFFF
  typedef signed long int32_t;
  -#define UINT32_C(value) __CONCAT(value, UL)
  +#define UINT32_C(value) value ## UL
  #define UINT32_MIN 0x00000000
  #define UINT32_MAX 0xFFFFFFFF
  typedef unsigned long uint32_t;
  -#define INT64_C(value) __CONCAT(value, LL)
  +#define INT64_C(value) value ## LL
  #define INT64_MIN -0x8000000000000000
  #define INT64_MAX 0x7FFFFFFFFFFFFFFF
  typedef signed long long int64_t;
  -#define UINT64_C(value) __CONCAT(value, ULL)
  +#define UINT64_C(value) value ## ULL
  #define UINT64_MIN 0x0000000000000000
  #define UINT64_MAX 0xFFFFFFFFFFFFFFFF
  typedef unsigned long long uint64_t;
  -#define INTMAX_C(value) __CONCAT(value, LL)
  +#define INTMAX_C(value) value ## LL
  #define INTMAX_MIN INT64_MIN
  #define INTMAX_MAX INT64_MAX
  typedef int64_t intmax_t;
  -#define UINTMAX_C(value) __CONCAT(value, ULL)
  +#define UINTMAX_C(value) value ## ULL
  #define UINTMAX_MIN UINT64_MIN
  #define UINTMAX_MAX UINT64_MAX
  typedef uint64_t uintmax_t;
  