NAME
	GetPrompt -- Returns the prompt for the current process (V36)

   SYNOPSIS
	success = GetPrompt(buf, len)
	D0                  D1   D2

	 BOOL GetPrompt( STRPTR,  LONG)

   FUNCTION
	Extracts the prompt string from the CLI structure and puts it 
	into the buffer.  If the buffer is too small, the string is truncated 
	appropriately and a failure code returned.  If no CLI structure is 
	present, a null string is returned in the buffer, and failure from
	the call (with  IoErr() == ERROR_OBJECT_WRONG_TYPE);

   INPUTS
	buf     - Buffer to hold extracted prompt
	len     - Number of bytes of space in buffer

   RESULT
	success - Success/failure indicator

   SEE ALSO
	 SetPrompt()