fix parsing of -a option

Author: gregdavill

ecpprog/ecpprog.c

@@ -830,7 +830,7 @@ int main(int argc, char **argv)
 	/* Decode command line parameters */
 	int opt;
 	char *endptr;
-	while ((opt = getopt_long(argc, argv, "d:i:I:rR:e:o:k:scbnStvpX", long_options, NULL)) != -1) {
+	while ((opt = getopt_long(argc, argv, "d:i:I:rR:e:o:k:scabnStvpX", long_options, NULL)) != -1) {
 		switch (opt) {
 		case 'd': /* device string */
 			devstr = optarg;