Two fixes an two alert()s.

Some things were using the global i and not a local i... this was
not a problem.

Added alerts when lightbar.draw() aborts due to no ANSI or no colour.

exec/lbshell.js

@@ -906,6 +906,7 @@ function draw_main(topline)
 
 function menu_opt(func)
 {
+	var i;
 	stop_mouse();
 	clear_screen();
 	func();

exec/load/lightbar.js

@@ -142,6 +142,7 @@ Lightbar.prototype.getval = function(current,key)
 	var ret=undefined;
 	var last_cur;
 	var mk;
+	var i;
 
 	if(!this.nodraw)
 		this.draw();
@@ -362,9 +363,11 @@ Lightbar.prototype.draw = function(current)
 	if(current!=undefined)
 		this.current=current;
 	if(!(user.settings & USER_ANSI)) {
+		alert("ANSI supported!");
 		return;
 	}
 	if(!(user.settings & USER_COLOR)) {
+		alert("Colour not supported!");
 		return;
 	}