Fixed some problems:

files that use the em_code module must include the em_code.h file
improved checking of definitions after use
fixed problem with ranges in case statements

lang/m2/comp/scope.C

@@ -49,7 +49,6 @@ open_scope(scopetype)
 	if (scopetype == OPENSCOPE) {
 		ls->sc_next = ls->sc_encl;
 	}
-	else	ls->sc_next = PervVis;
 	CurrVis = ls;
 }