[AD] pack_fgets returns wrong address

[Matthew Leverton <matthew@xxxxxxxxxx>]

See this thread:

http://www.allegro.cc/forums/view_thread.php?_id=247285

According to the source comments:

"Returns a pointer to where it stored the text, or NULL on error"

But it doesn't, it returns pointer+strlen(pointer), due to 'p' being 
incremented.

In file.c, around line 2014:

  char *pmax, *buffer=p;

And then on 2005:

  return buffer;

Something like that does the trick.

--
Matthew Leverton - matthew@xxxxxxxxxx
http://www.allegro.cc