Mail: fixed build without SSL.

Broken by d84f13618277 and 12ea1de7d87c (1.19.8).

Reported by Sergey Osokin.
diff --git a/src/mail/ngx_mail_auth_http_module.c b/src/mail/ngx_mail_auth_http_module.c
index 06ded47..2a198f4 100644
--- a/src/mail/ngx_mail_auth_http_module.c
+++ b/src/mail/ngx_mail_auth_http_module.c
@@ -1135,10 +1135,10 @@
     size_t                     len;
     ngx_buf_t                 *b;
     ngx_str_t                  login, passwd;
+    ngx_connection_t          *c;
 #if (NGX_MAIL_SSL)
     ngx_str_t                  verify, subject, issuer, serial, fingerprint,
                                raw_cert, cert;
-    ngx_connection_t          *c;
     ngx_mail_ssl_conf_t       *sslcf;
 #endif
     ngx_mail_core_srv_conf_t  *cscf;
@@ -1151,9 +1151,10 @@
         return NULL;
     }
 
+    c = s->connection;
+
 #if (NGX_MAIL_SSL)
 
-    c = s->connection;
     sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module);
 
     if (c->ssl && sslcf->verify) {
diff --git a/src/mail/ngx_mail_handler.c b/src/mail/ngx_mail_handler.c
index b901053..0aaa0e7 100644
--- a/src/mail/ngx_mail_handler.c
+++ b/src/mail/ngx_mail_handler.c
@@ -272,16 +272,17 @@
 static void
 ngx_mail_init_session_handler(ngx_event_t *rev)
 {
-    ngx_connection_t    *c;
-    ngx_mail_session_t  *s;
+    ngx_connection_t  *c;
 
     c = rev->data;
-    s = c->data;
 
 #if (NGX_MAIL_SSL)
     {
+    ngx_mail_session_t   *s;
     ngx_mail_ssl_conf_t  *sslcf;
 
+    s = c->data;
+
     sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module);
 
     if (sslcf->enable || s->ssl) {