Fixed starting without arguments

src/main.c

@@ -44,6 +44,9 @@ int main(int argc, char * argv[])
 			default:
 				return _usage();
 		}
+	if(optind == argc)
+		browser_new(NULL);
+	else
 		for(i = optind; i < argc; i++)
 			browser_new(argv[i]);
 	gtk_main();