unbreak chat line

xtrn/dicewarz2/game.js

@@ -100,7 +100,7 @@ function lobby() {
 		while(1) {
 			cycle();
 			var cmd=input.getkey(hotkeys);
-			if(!cmd) 
+			if(cmd === undefined) 
 				continue;
 			switch(cmd) {
 			case KEY_UP:
@@ -158,7 +158,6 @@ function lobby() {
 					hotkeys=true;
 				}
 			}
-				
 			if(hotkeys) {
 				gameList();
 			}