Use a 64 bit off_t throughout the library and tests on POSIX

Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>

src/common.h

 #ifndef INCLUDE_common_h__
 #define INCLUDE_common_h__
 
+/** Force 64 bit off_t size on POSIX. */
+#define _FILE_OFFSET_BITS 64
+
 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__MINGW32__)
 #define GIT_WIN32 1
 #endif

src/fileops.h

@@ -6,9 +6,6 @@
 #ifndef INCLUDE_fileops_h__
 #define INCLUDE_fileops_h__
 
-/** Force 64 bit off_t size on POSIX. */
-#define _FILE_OFFSET_BITS 64
-
 #include "common.h"
 #include "map.h"
 #include "dir.h"

tests/t0001-errno.c

 #include "test_lib.h"
 #include "errors.h"
-#include <string.h>
 
 BEGIN_TEST(errno_zero_on_init)
 	must_be_true(git_errno == 0);

tests/t0020-dirent.c

-#include <stdarg.h>
 #include "test_lib.h"
 #include "fileops.h"
 

tests/t0101-oid.c

 #include "test_lib.h"
 #include <git/oid.h>
-#include <stdlib.h>
 
 BEGIN_TEST(oid_szs)
 	git_oid out;

tests/t0201-existsloose.c

 #include "test_lib.h"
 #include "test_helpers.h"
 #include <git/odb.h>
-#include "fileops.h"
 
 static char *odb_dir = "test-objects";
 

tests/t0202-readloose.c

@@ -2,7 +2,6 @@
 #include "test_lib.h"
 #include "test_helpers.h"
 #include <git/odb.h>
-#include "fileops.h"
 
 /*
  * read loose objects from the object directory. The objects are

tests/t0203-readloose.c

@@ -2,7 +2,6 @@
 #include "test_lib.h"
 #include "test_helpers.h"
 #include <git/odb.h>
-#include "fileops.h"
 
 /*
  * read loose objects from the object directory. The objects are

tests/test_helpers.c

@@ -23,6 +23,7 @@
  * Boston, MA 02110-1301, USA.
  */
 
+#include "common.h"
 #include "test_helpers.h"
 #include "fileops.h"
 

tests/test_lib.c

@@ -23,10 +23,7 @@
  * Boston, MA 02110-1301, USA.
  */
 
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdarg.h>
-#include <string.h>
+#define GIT__NO_HIDE_MALLOC
 #include "test_lib.h"
 
 struct test_info

tests/test_lib.h

@@ -23,9 +23,14 @@
  * Boston, MA 02110-1301, USA.
  */
 
-#include <stdio.h>
+#include "common.h"
 #include <git/common.h>
 
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+
 /** Declare a function never returns to the caller. */
 #ifdef __GNUC__
 # define NORETURN __attribute__((__noreturn__))