update Path handling for Windows when compile on cygwin:
#if 0//__WIN32__
#define RLD_PATH_SEPARATOR        '\\'
#define RLD_PATHSTR_SEPARATOR     ';'
#define RLD_PATHSTR_SEPARATOR_STR ";"
#define RLD_DRIVE_SEPARATOR       (1)
#else
#define RLD_PATH_SEPARATOR        '/'
#define RLD_PATHSTR_SEPARATOR     ':'
#define RLD_PATHSTR_SEPARATOR_STR ":"
#define RLD_DRIVE_SEPARATOR       (0)
#endif