* monoburg.c:  Add   a  `--with-references'   option  which  makes
	monoburg to  produce `mono_burg_emit_*' functions  that takes tree
	as a `MBTREE&'.
	
	The user is warned that the code produced will only be compilable
	with a C++ compiler.
	
	* monoburg.c (emit_emmitter_func): Add fake use of arguments of 
	`emit' functions produced to avoid `unused parameter' warning when
	compiling output.