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turn ptrdiff_t into a 64 bit type

while technically a 32 bit ptrdiff_t is in spec on
systems with 64 bit ponters as long as we guarantee
that individual objects are small enough, this can
confuse legitimate code, so lets fix this.

--- /dev/null

+++ b/amd64/include/ape/stddef.h

@@ -1,0 +1,7 @@

+#ifndef __STDDEF_ARCH_H

+#define __STDDEF_ARCH_H

+

+typedef long long _ptrdiff_t;

+#include "/sys/include/ape/stddef.h"

+

+#endif /* __STDDEF_ARCH_H */

--- /dev/null

+++ b/arm64/include/ape/stddef.h

@@ -1,0 +1,7 @@

+#ifndef __STDDEF_ARCH_H

+#define __STDDEF_ARCH_H

+

+typedef long long _ptrdiff_t;

+#include "/sys/include/ape/stddef.h"

+

+#endif /* __STDDEF_ARCH_H */

--- a/sys/include/ape/stddef.h

+++ b/sys/include/ape/stddef.h

@@ -1,6 +1,10 @@

 #ifndef __STDDEF_H

 #define __STDDEF_H

+#ifndef __STDDEF_ARCH_H

+typedef long _ptrdiff_t;

+#endif

+

 #ifndef NULL

 #ifdef __cplusplus

 #define NULL 0

@@ -10,7 +14,7 @@

 #endif

 #define offsetof(ty,mem) ((size_t) &(((ty *)0)->mem))

-typedef long ptrdiff_t;

+typedef _ptrdiff_t ptrdiff_t;

 #ifndef _SIZE_T

 #define _SIZE_T

 typedef unsigned long size_t;