mescc: Mes C Library: Prepare for M2-Planet: _getcwd.

* lib/linux/_getcwd.c (_getcwd): Prepare for M2-Planet.

lib/linux/_getcwd.c

@@ -25,7 +25,7 @@
 char *
 _getcwd (char *buffer, size_t size)
 {
-  int r = _sys_call2 (SYS_getcwd, (long) buffer, (long) size);
+  int r = _sys_call2 (SYS_getcwd, buffer, size);
   if (r >= 0)
     return buffer;
   return 0;