/** \brief get next path component in filepath
\param path_p pointer to path (updated to "next" entry if any)
\param comp upon pointer to component (if component is found)
\retval 0 no component found (and no more componennts)
\retval >0 length of component (length of *comp)
/** \brief get next path component in filepath
\param path_p pointer to path (updated to "next" entry if any)
\param comp upon pointer to component (if component is found)
\retval 0 no component found (and no more componennts)
\retval >0 length of component (length of *comp)