io.c (NUM2IOCTLREQ): Accept a value more than INT_MAX

ioctl accepts int as request arguments on some platforms, but some
requests are more than INT_MAX, e.g., RNDGETENTCNT(0x80045200).
Passing (0x80045200 | (-1 << 32)) may work around the issue, but it may
not work on a platform where ioctl accepts unsigned long.  So this
change uses NUM2LONG and then casts it to int.

io.c

@@ -9565,7 +9565,7 @@ rb_f_select(int argc, VALUE *argv, VALUE obj)
 # define NUM2IOCTLREQ(num) NUM2ULONG(num)
 #else
  typedef int ioctl_req_t;
-# define NUM2IOCTLREQ(num) NUM2INT(num)
+# define NUM2IOCTLREQ(num) ((int)NUM2LONG(num))
 #endif
 
 #ifdef HAVE_IOCTL