rather useless changes to keep testsuite happy on osx compatibility

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@29885 72102866-910b-0410-8b05-ffd578937521

Source/NSKeyedArchiver.m

@@ -556,6 +556,17 @@ static NSDictionary *makeReference(unsigned ref)
   return _delegate;
 }
 
+- (NSString*) description
+{
+  if (_data == nil)
+    {
+      // For consistency with OSX
+      [NSException raise: NSInvalidArgumentException
+		  format: @"method sent to uninitialised archiver"];
+    }
+  return [super description];
+}
+
 - (void) encodeArrayOfObjCType: (const char*)aType
 			 count: (NSUInteger)aCount
 			    at: (const void*)address

Source/NSKeyedUnarchiver.m

@@ -749,6 +749,17 @@ static NSMapTable	*globalClassMap = 0;
   return _delegate;
 }
 
+- (NSString*) description
+{
+  if (_archive == nil)
+    {
+      // For consistency with OSX
+      [NSException raise: NSInvalidArgumentException
+		  format: @"method sent to uninitialised unarchiver"];
+    }
+  return [super description];
+}
+
 - (void) finishDecoding
 {
   [_delegate unarchiverWillFinish: self];