don't autorelease strings on GNUstep that are created with CFStringCreateWithBytes() on macOS

Author: mpw

MPWMAXParser.m

@@ -968,7 +968,7 @@ -(void)clearAttributes
  for (int i=0;i< len;i++ ) {
  if ( start[i] & 128 ) {
 #if GS_API_LATEST
- return [[[NSString alloc] initWithBytes:start length:len encoding:cfDataEncoding] autorelease];
+ return [[NSString alloc] initWithBytes:start length:len encoding:cfDataEncoding];
 
 #else
  return (id)CFStringCreateWithBytes(NULL, (const unsigned char*)start, len, (CFStringEncoding)cfDataEncoding, NO);