sysif: remove low-level MPI code for off_t conversion.

* sysif.c (off_t_num): Retarget to just use c_i32 or c_i64
from ctypes.c, depending on which of these types is the same
width as off_t.
(stdio_fseek): Pass identifying "self" string to off_t_num.
Don't use off_t_num for fseek's offset argument which is of
type long; for that we can use c_long from ctypes.c.

* sysif.h (off_t_num): Declaration updated.

1 files changed, 1 insertions, 1 deletions

diff --git a/sysif.h b/sysif.h
index 3cbf0609..02a5a1da 100644
--- a/sysif.h
+++ b/sysif.h
@@ -56,7 +56,7 @@ val stat_to_struct(struct stat st, val path);
 #endif
 val statp(val path);
 val statf(val path);
-off_t off_t_num(val num);
+off_t off_t_num(val num, val self);
 val num_off_t(off_t offnum);
 val stdio_ftell(FILE *);
 val stdio_fseek(FILE *, val, int whence);