Lua : fix Sys.systemName for #5042

std/lua/_std/Sys.hx

@@ -44,7 +44,7 @@ class Sys {
 	public inline static function args() : Array<String> {
 		var args = lua.Lib.tableToArray(lua.Lua.arg).copy();
 		args.shift();
-		return args;
+		return args; 
 	}
 	public static function command( cmd : String, ?args : Array<String> ) : Int  {
 		cmd = Boot.shellEscapeCmd(cmd, args);
@@ -74,7 +74,7 @@ class Sys {
 				s = s.gsub('%s+$', '');
 				s = s.gsub('[\n\r]+', ' ');
 				if (s == "Darwin") return "Mac";
-				else if (s.lower().find("bsd") > 0) return "BSD";
+				else if (s.lower().find("bsd") != null) return "BSD";
 				else return "Linux";
 			}
 			case "\\" : return "Windows";