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_exmback()         Free allocated memory


Syntax Usage:  #include         "extend.h"

               void             _exmback(pointer, bytes)

               unsigned char    *pointer;   Pointer from _exmgrab()
               unsigned int     bytes;      Size passed to _exmgrab()

Description:   _exmback() releases the memory allocated by _exmgrab().
               Note that the same pointer and size used in _exmgrab must
               be passed as parameters.


----------------------------------- Example --------------------------------

   size = 512;
   buff = _exmgrab(size);   /* allocate memory */
    if (buff)               /* if successful (!null) */
    check = TRUE;
   .
   .
   .
   if (check)
    _exmback(buff, size);   /* deallocate memory */