Use proper variable type for format attribute.

DeviceIoControl with flag FSCTL_SET_COMPRESSION expect the format to be
as unsigned short not integer which can be 32 or 64 bits depending on
the compile. Switched this variable to uint16_t which should be an
unsigned short.

Fixes #436: Restore crash file daemon

src/findlib/attribs.c

@@ -717,7 +717,7 @@ static bool set_win32_attributes(JCR *jcr, ATTR *attr, BFILE *ofd)
        * Restore the compressed file attribute on the restored file.
        */
       if (atts.dwFileAttributes & FILE_ATTRIBUTE_COMPRESSED) {
-         int format = COMPRESSION_FORMAT_DEFAULT;
+         uint16_t format = COMPRESSION_FORMAT_DEFAULT;
 
          Dmsg1(100, "Restore FILE_ATTRIBUTE_COMPRESSED on %s\n", attr->ofname);
          DeviceIoControl(ofd->fh, FSCTL_SET_COMPRESSION, &format, sizeof(format), NULL, 0, NULL, NULL);