fix: use cl:nil

macro if taking nil as not cl:nil and including signed checks in unsigned types

library/math/integral.lisp

@@ -248,17 +248,17 @@ are floored and truncated division, respectively."
                       (lisp ,type (a) (cl:isqrt a)))
                  `(lisp ,type (a) (cl:isqrt a)))))))
 
-(%define-integral-native Integer t)
-(%define-integral-native I8 t)
-(%define-integral-native I16 t)
-(%define-integral-native I32 t)
-(%define-integral-native I64 t)
-(%define-integral-native IFix t)
-(%define-integral-native U8 nil)
-(%define-integral-native U16 nil)
-(%define-integral-native U32 nil)
-(%define-integral-native U64 nil)
-(%define-integral-native UFix nil)
+(%define-integral-native Integer cl:t)
+(%define-integral-native I8 cl:t)
+(%define-integral-native I16 cl:t)
+(%define-integral-native I32 cl:t)
+(%define-integral-native I64 cl:t)
+(%define-integral-native IFix cl:t)
+(%define-integral-native U8 cl:nil)
+(%define-integral-native U16 cl:nil)
+(%define-integral-native U32 cl:nil)
+(%define-integral-native U64 cl:nil)
+(%define-integral-native UFix cl:nil)
 
 (cl:defmacro %define-native-expt (type)
   (cl:let ((^ (cl:intern (cl:concatenate 'cl:string (cl:symbol-name type) "-^")))