main: fix the case where user has "halt" as login shell. Closes 9986

halt::0:0::/:/sbin/halt

function                                             old     new   delta
run_applet_and_exit                                  748     751      +3
run_applet_no_and_exit                               467     459      -8

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

libbb/vfork_daemon_rexec.c

@@ -180,7 +180,7 @@ int FAST_FUNC spawn_and_wait(char **argv)
 			 * as of yet (and that should probably always stay true).
 			 */
 			/* xfunc_error_retval and applet_name are init by: */
-			run_applet_no_and_exit(a, argv);
+			run_applet_no_and_exit(a, argv[0], argv);
 		}
 # endif
 	}