Implemented copy methods for NSImmutableString so that the copied string

does not track the parent


git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@12495 72102866-910b-0410-8b05-ffd578937521

Source/GSString.m

@@ -3009,6 +3009,26 @@ transmute(ivars self, NSString *aString)
   [super dealloc];
 }
 
+- (id) copy
+{
+  return [_parent copy];
+}
+
+- (id) copyWithZone: (NSZone*)z
+{
+  return [_parent copyWithZone: z];
+}
+
+- (id) mutableCopy
+{
+  return [_parent mutableCopy];
+}
+
+- (id) mutableCopyWithZone: (NSZone*)z
+{
+  return [_parent mutableCopyWithZone: z];
+}
+
 - (void) encodeWithCoder: (NSCoder*)aCoder
 {
   [_parent encodeWithCoder: aCoder];