Correct the last call to dialog_update_label_conv

If one of our buddies is/her side of the OTR session, don't
automatically change bel on the OTR button on our side to "Finished",
since may be other sessions for the same buddy still in ENCRYPTED.
This was the last call to dialog_update_label_conv that still had a
hardcoded trust label set, rather than using
otrg_plugin_context_to_trust to get the trust label corresponding to the
currently selected instance.

ChangeLog

@@ -3,6 +3,11 @@
 	* otr-plugin.c: Add a timer_control callback for the last-minute
 	libotr 4 API change.
 
+	* gtk-dialog.c (otrg_gtk_dialog_finished): If one of our buddies
+	ends his/her side of the OTR session, don't automatically change
+	the label on the OTR button on our side to "Finished", since
+	there may be other sessions for the same buddy still in ENCRYPTED.
+
 2012-08-24
 
 	* otr-plugin.c: Turn off the beta dialog

gtk-dialog.c

@@ -1627,6 +1627,7 @@ static void otrg_gtk_dialog_finished(const char *accountname,
     /* See if there's a conversation window we can put this in. */
     PurpleAccount *account;
     PurpleConversation *conv;
+    ConnContext *context;
     char *buf;
 
     account = purple_accounts_find(accountname, protocol);
@@ -1645,7 +1646,8 @@ static void otrg_gtk_dialog_finished(const char *accountname,
 
     g_free(buf);
 
-    dialog_update_label_conv(conv, TRUST_FINISHED);
+    context = otrg_plugin_conv_to_selected_context(conv, 0);
+    dialog_update_label_conv(conv, otrg_plugin_context_to_trust(context));
     close_smp_window(conv);
 }