Function            popup_free - frees memory allocated by popup menu

  Syntax              void popup_free(struct popup_header *ph);

  Prototype in        menuhk.h

  Remarks             frees all memory allocated to a popup menu.

  Return value        nothing.

  Note                see popup_alloc()

  See also            menuhk.h
                      isHiliteable(), menu_popup(), popup_alloc(),
                      popup_get(), popup_restore(), popup_setcurrent(),
                      pophilite(), popunlite()
                      popuperrno

  Example             see demopop.c