mail: move "opts" from globals

function                                             old     new   delta
popmaildir_main                                      812     823     +11
sendmail_main                                       1295    1301      +6
makemime_main                                        291     288      -3
parse                                                970     966      -4
reformime_main                                       107     100      -7
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/3 up/down: 17/-14)              Total: 3 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/mailutils/makemime.c b/mailutils/makemime.c
index 53a1820..1ff2012 100644
--- a/mailutils/makemime.c
+++ b/mailutils/makemime.c
@@ -173,6 +173,7 @@
 int makemime_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int makemime_main(int argc UNUSED_PARAM, char **argv)
 {
+	unsigned opts;
 	llist_t *opt_headers = NULL, *l;
 	const char *opt_output;
 	const char *content_type = "application/octet-stream";