SIZE_T_MAX redefined from limits.h

[lhunath]

arraylist.c includes limits.h which when building for iOS/ARM, already defines SIZE_T_MAX:

#if !defined(_ANSI_SOURCE)
#ifdef __LP64__
#define LONG_BIT        64
#else /* !__LP64__ */
#define LONG_BIT        32
#endif /* __LP64__ */
#define SSIZE_MAX       LONG_MAX        /* max value for a ssize_t */
#define WORD_BIT        32

#if (!defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE)) || defined(_DARWIN_C_SOURCE)
#define SIZE_T_MAX      ULONG_MAX       /* max value for a size_t */

#define UQUAD_MAX       ULLONG_MAX
#define QUAD_MAX        LLONG_MAX
#define QUAD_MIN        LLONG_MIN

#endif /* (!_POSIX_C_SOURCE && !_XOPEN_SOURCE) || _DARWIN_C_SOURCE */
#endif /* !_ANSI_SOURCE */

The result is the following build error, when building for the iOS SDK:

  CC       arraylist.lo
  CC       debug.lo
  CC       json_c_version.lo
arraylist.c:26:9: error: 'SIZE_T_MAX' macro redefined [-Werror,-Wmacro-redefined]
#define SIZE_T_MAX UINT_MAX
        ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS10.3.sdk/usr/include/arm/limits.h:101:9: note: previous definition is here
#define SIZE_T_MAX      ULONG_MAX       /* max value for a size_t */
        ^
1 error generated.
make[1]: *** [arraylist.lo] Error 1
make[1]: *** Waiting for unfinished jobs....
make: *** [install-recursive] Error 1

[lhunath]

I believe this is an accurate fix:

diff --git arraylist.c arraylist.c
index 8439cc2..ddeb8d4 100644
--- arraylist.c
+++ arraylist.c
@@ -22,6 +22,7 @@
 # include <strings.h>
 #endif /* HAVE_STRINGS_H */

+#ifndef SIZE_T_MAX
 #if SIZEOF_SIZE_T == SIZEOF_INT
 #define SIZE_T_MAX UINT_MAX
 #elif SIZEOF_SIZE_T == SIZEOF_LONG
@@ -31,6 +32,7 @@
 #else
 #error Unable to determine size of size_t
 #endif
+#endif

 #include "arraylist.h"