num_ex: eliminate ill-considered cast.

* lib.h (num_ex): Remove the cast to ucnum, which will cause
this macro to misbehave for negative arguments. For instance,
-1 > (ucnum) INT_PTR_MAX will compare as true! The -1 gets
converted to the unsigned type and becomes UINT_PTR_MAX.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib.h b/lib.h
index f3d45e2b..114205a6 100644
--- a/lib.h
+++ b/lib.h
@@ -768,7 +768,7 @@ val plist_to_alist(val list);
 val improper_plist_to_alist(val list, val boolean_keys);
 val num(cnum val);
 val unum(ucnum u);
-#define num_ex(x) if3((x) > (ucnum) INT_PTR_MAX, unum(x), num(x))
+#define num_ex(x) if3((x) > INT_PTR_MAX, unum(x), num(x))
 
 val flo(double val);
 cnum c_num(val num, val self);