[evolution-rss] don't crash on failed plugin initialization

[Lucian Langa <lucilanga src gnome org>]

commit de5ddb1df6d9c22bf6918cd81a8783b8228c67a2
Author: Lucian Langa <lucilanga gnome org>
Date:   Fri Mar 20 10:58:44 2015 +0100

    don't crash on failed plugin initialization

 src/e-mail-formatter-evolution-rss.c |    4 ++++
 src/rss.c                            |    2 ++
 2 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/src/e-mail-formatter-evolution-rss.c b/src/e-mail-formatter-evolution-rss.c
index b3eb77a..09ba3cc 100644
--- a/src/e-mail-formatter-evolution-rss.c
+++ b/src/e-mail-formatter-evolution-rss.c
@@ -37,6 +37,7 @@
 #include "e-mail-part-rss.h"
 
 extern gchar *commstream;
+extern int rss_init;
 
 typedef EMailFormatterExtension EMailFormatterRSS;
 typedef EMailFormatterExtensionClass EMailFormatterRSSClass;
@@ -128,6 +129,9 @@ emfe_evolution_rss_format (EMailFormatterExtension *extension,
                goto fail;
        }
 
+       if (!rss_init)
+                       goto fail;
+
        h = g_strdup(e_web_view_get_html (E_WEB_VIEW (rss_get_display())));
 
        website = (gchar *)camel_medium_get_header (
diff --git a/src/rss.c b/src/rss.c
index 69d49a5..2ae242e 100644
--- a/src/rss.c
+++ b/src/rss.c
@@ -22,6 +22,7 @@
 #endif
 
 int rss_verbose_debug = 0;
+int rss_init = 0;
 
 #define _GNU_SOURCE
 #include <string.h>
@@ -3398,6 +3399,7 @@ void org_gnome_cooly_rss_startup(void *ep, void *t)
        custom_feed_timeout();
 
        rss_init_images();
+       rss_init = 1;
 }
 
 /* check if rss folders exists and create'em otherwise */