Make GIT_WIN32 an internal declaration

The `GIT_WIN32` macro should only be used internally; keep it as such.

include/git2/common.h

@@ -73,11 +73,6 @@ typedef size_t size_t;
 # define GIT_FORMAT_PRINTF(a,b) /* empty */
 #endif
 
-/** Defined when building on Windows (but not via cygwin) */
-#if (defined(_WIN32)) && !defined(__CYGWIN__)
-#define GIT_WIN32 1
-#endif
-
 #ifdef __amigaos4__
 #include <netinet/in.h>
 #endif
@@ -101,10 +96,10 @@ GIT_BEGIN_DECL
  * environment variable). A semi-colon ";" is used on Windows and
  * AmigaOS, and a colon ":" for all other systems.
  */
-#if defined(GIT_WIN32) || defined(AMIGA)
-#define GIT_PATH_LIST_SEPARATOR ';'
+#if (defined(_WIN32) && !defined(__CYGWIN__)) || defined(AMIGA)
+# define GIT_PATH_LIST_SEPARATOR ';'
 #else
-#define GIT_PATH_LIST_SEPARATOR ':'
+# define GIT_PATH_LIST_SEPARATOR ':'
 #endif
 
 /**

src/util/git2_util.h

@@ -49,6 +49,10 @@ typedef struct git_str git_str;
 # define GIT_WARN_UNUSED_RESULT
 #endif
 
+#if (defined(_WIN32)) && !defined(__CYGWIN__)
+# define GIT_WIN32 1
+#endif
+
 #include <assert.h>
 #include <errno.h>
 #include <limits.h>

src/util/util.h

@@ -7,15 +7,15 @@
 #ifndef INCLUDE_util_h__
 #define INCLUDE_util_h__
 
-#ifndef GIT_WIN32
-# include <ctype.h>
-#endif
-
 #include "str.h"
 #include "git2_util.h"
 #include "strnlen.h"
 #include "thread.h"
 
+#ifndef GIT_WIN32
+# include <ctype.h>
+#endif
+
 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
 #define bitsizeof(x) (CHAR_BIT * sizeof(x))
 #define MSB(x, bits) ((x) & (~UINT64_C(0) << (bitsizeof(x) - (bits))))