Check if user pressed cancel in password dialog

elauncher/elauncher.cpp

@@ -453,9 +453,8 @@ tryagain:
 	if (param_root) {
 		char *line;
 
-		// TODO: fix password dialog so that Cancel can be detected
-		// At the moment it's impossible to tell if the password is blank
 		const char *pwd = password(_("This program requires administrator privileges.\nPlease enter your password below:"));
+		if (pwd == 0) { fprintf(stderr,"Canceled\n"); exit(1); }
 		
 		// Chat routine
 		while (1) {