Memory leak and other fixes from Frith-MacDonald.

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@2775 72102866-910b-0410-8b05-ffd578937521

Source/NSValue.m

@@ -88,6 +88,11 @@
     return self;
 }
 
+- (id)copy
+{
+    return [self copyWithZone: NSDefaultMallocZone()];
+}
+
 - (id)copyWithZone:(NSZone *)zone
 {
     if (NSShouldRetainWithZone(self, zone))
@@ -203,6 +208,20 @@
     [self subclassResponsibility:_cmd];
 }
 
+- (BOOL)isEqual: (id)other
+{
+    if ([other isKindOfClass: [self class]]) {
+	return [self isEqualToValue: other];
+    }
+    return NO;
+}
+
+- (BOOL)isEqualToValue: (NSValue*)other
+{
+    [self subclassResponsibility:_cmd];
+    return NO;
+}
+
 - (const char *)objCType
 {
     [self subclassResponsibility:_cmd];