$NetBSD: patch-ae,v 1.1 2012/10/22 22:35:53 rh Exp $

Make this compile with libobjc2.

--- FoundationExtensions.subproj/NSObject+Extensions.m.orig	2003-01-25 22:33:49.000000000 +0000
+++ FoundationExtensions.subproj/NSObject+Extensions.m
@@ -117,12 +117,12 @@ BOOL EDClassIsSuperclassOfClass(Class aC
 {
     Class class;
 
-    class = subClass->super_class;
+    class = class_getSuperclass(subClass);
     while(class != nil)
         {
         if(class == aClass)
             return YES;
-        class = class->super_class;
+        class = class_getSuperclass(class);
         }
     return NO;
 }
@@ -175,12 +175,17 @@ NSArray *EDSubclassesOfClass(Class aClas
     NSMutableArray *subclasses;
     Class subClass;
     void *es = NULL;
+    int numClasses = 0, i;
+    Class *classes = objc_copyClassList(&numClasses);
 
     subclasses = [NSMutableArray array];
-    while((subClass = objc_next_class(&es)) != Nil)
-        if(EDClassIsSuperclassOfClass(aClass, subClass) == YES)
-            [subclasses addObject:subClass];
-
+    if (classes)
+    {
+        for (i = 0; i < numClasses; i++)
+            if(EDClassIsSuperclassOfClass(aClass, classes[i]) == YES)
+                [subclasses addObject: classes[i]];
+        free(classes);
+    }
     return subclasses;
 #endif
 }