[balsa/wip/gtk4: 269/351] mailbox local: Do not dereference NULL pointer

[Peter Bloomfield <peterb src gnome org>]

commit a95f8c806963e3f146357c52998433f05053a46c
Author: Peter Bloomfield <PeterBloomfield bellsouth net>
Date:   Mon Apr 2 20:35:24 2018 -0400

    mailbox local: Do not dereference NULL pointer
    
    Boneheaded optimization!

 libbalsa/mailbox_local.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)
---
diff --git a/libbalsa/mailbox_local.c b/libbalsa/mailbox_local.c
index 7f09344..eae2c89 100644
--- a/libbalsa/mailbox_local.c
+++ b/libbalsa/mailbox_local.c
@@ -929,11 +929,8 @@ message_match_real(LibBalsaMailbox   *mailbox,
 
     if (entry->idle_pending) {
         return FALSE;   /* Can't match. */
-
     }
 
-    headers = libbalsa_message_get_headers(message);
-
     switch (cond->type) {
     case CONDITION_STRING:
         if (CONDITION_CHKMATCH(cond, (CONDITION_MATCH_TO |
@@ -958,6 +955,7 @@ message_match_real(LibBalsaMailbox   *mailbox,
         /* do the work */
         if (CONDITION_CHKMATCH(cond, CONDITION_MATCH_TO)) {
             g_assert(is_refed);
+            headers = libbalsa_message_get_headers(message);
             if (headers->to_list != NULL) {
                 gchar *str =
                     internet_address_list_to_string(headers->to_list, FALSE);
@@ -985,6 +983,7 @@ message_match_real(LibBalsaMailbox   *mailbox,
         }
         if (CONDITION_CHKMATCH(cond, CONDITION_MATCH_CC)) {
             g_assert(is_refed);
+            headers = libbalsa_message_get_headers(message);
             if (headers->cc_list != NULL) {
                 gchar *str =
                     internet_address_list_to_string(headers->cc_list, FALSE);