NSDateFormatter bug fix

[Andreas Hoeschler]

Hi guys,

I just spent 3 hours again to find and fix a bug in base that is really 
really unnecessary. Please check par reference paramerters against null 
before writing to them.

@implementation NSDateFormatter (GNUstepFix)

- (BOOL)getObjectValue:(id *)anObject forString:(NSString *)string 
errorDescription:(NSString**)error
{
   NSCalendarDate *d = [NSCalendarDate dateWithString:string 
calendarFormat:_dateFormat];
   if (d == nil)
     {
      if (_allowsNaturalLanguage)
        {
         d = [NSCalendarDate dateWithNaturalLanguageString: string];
        }
      if (d == nil)
        {
         if (error) *error = @"Couldn't convert to date"; // 
<------------------------------
         return NO;
        }
     }
   if (anObject) *anObject = d; // <-------------------------------
   return YES;
}

@end

Whoever has write privilege, please put this fix into the source tree.

Thanks,

  Andreas