Fixed some bugs where the literal 0 was being used as the value of an invalid file handle.  This affects platforms like Solaris, which use open/close, etc., instead of fopen/fclose, etc.  Removed unnecessary transcoding of file names, that resulted in round-trip transcoding.  Moved calls to initializer list to avoid initializing to a default value.

git-svn-id: https://svn.apache.org/repos/asf/xerces/c/trunk@451489 13f79535-47bb-0310-9956-ffa450edef68