#2 Odd filename characters prevent place save and bookmark save

[Anonymous]

On an Jinke Hanlin/Astak Pocket Pro bookreader, a filename with an odd character (an ampersand, &) was preventing Coolreader 3 saving the current position on exit, and also prevented the bookmarks being saved. Might also happen with other characters (like comma, quote, exclamation etc) that some bookstores have put in book filenames.