pidgin-crash-fix

diff --git a/pidgin/gtkconv.c b/pidgin/gtkconv.c
--- a/pidgin/gtkconv.c
+++ b/pidgin/gtkconv.c
@@ -6459,8 +6459,11 @@
            PIDGIN_CONVERSATION_THEME_TEMPLATE_OUTGOING_CONTENT);

    } else if ((flags & PURPLE_MESSAGE_RECV) && (old_flags & PURPLE_MESSAGE_RECV)) {
-       GList *history = purple_conversation_get_message_history(conv);
-       PurpleConvMessage *last_msg = (PurpleConvMessage *)history->data;
+       GList *history = purple_conversation_get_message_history(gtkconv->last_conversed);
+       PurpleConvMessage *last_msg = history ? (PurpleConvMessage *)history->data : NULL;
+
+       g_assert(history != NULL);
+       g_assert(last_msg != NULL);

        /* If the senders are the same, use appendNextMessage */
        if (purple_strequal(purple_conversation_message_get_sender(last_msg), name)) {
@@ -6480,6 +6483,7 @@
            PIDGIN_CONVERSATION_THEME_TEMPLATE_STATUS);
    }
    gtkconv->last_flags = flags;
+   gtkconv->last_conversed = conv;

    smileyed = smiley_parse_markup(displaying, purple_account_get_protocol_id(account));
    msg = replace_message_tokens(message_html, conv, name, alias, smileyed, flags, mtime);
diff --git a/pidgin/gtkconv.h b/pidgin/gtkconv.h
--- a/pidgin/gtkconv.h
+++ b/pidgin/gtkconv.h
@@ -83,6 +83,7 @@
 struct _PidginConversation
 {
    PurpleConversation *active_conv;
+   PurpleConversation *last_conversed;
    GList *convs;
    GList *send_history;