Fix bool type on PowerPC

basis/alien/c-types/c-types.factor

@@ -259,8 +259,9 @@ M: long-long-type box-return ( type -- )
     [ dup c-setter '[ _ <c-object> [ 0 @ ] keep ] ] bi
     (( value -- c-ptr )) define-inline ;
 
-: c-bool> ( int -- ? )
-    0 = not ; inline
+: >c-bool ( ? -- int ) 1 0 ? ; inline
+
+: c-bool> ( int -- ? ) 0 = not ; inline
 
 : define-primitive-type ( type name -- )
     [ typedef ]
@@ -409,8 +410,8 @@ CONSTANT: primitive-types
     "uchar" define-primitive-type
 
     <c-type>
-        [ alien-unsigned-1 zero? not ] >>getter
-        [ [ 1 0 ? ] 2dip set-alien-unsigned-1 ] >>setter
+        [ alien-unsigned-1 c-bool> ] >>getter
+        [ [ >c-bool ] 2dip set-alien-unsigned-1 ] >>setter
         1 >>size
         1 >>align
         "box_boolean" >>boxer

basis/cpu/ppc/ppc.factor

@@ -713,4 +713,10 @@ USE: vocabs.loader
 } cond
 
 "complex-double" c-type t >>return-in-registers? drop
-"bool" c-type 4 >>size 4 >>align drop
+
+"bool" c-type
+4 >>size
+4 >>align
+[ alien-unsigned-1 c-bool> ] >>getter
+[ [ >c-bool ] 2dip set-alien-unsigned-1 ] >>setter
+drop