[polari/gnome-3-24] room: Fix infinite loop with unset nickname

[Florian Müllner <fmuellner src gnome org>]

commit 8b0acb04a72719530044f7786f4cfc5d84231e74
Author: Florian Müllner <fmuellner gnome org>
Date:   Mon Apr 24 21:50:06 2017 +0200

    room: Fix infinite loop with unset nickname
    
    While an empty (self) nick is unexpected, it's apparently possible
    under some circumstances. Handle that case explicitly to avoid
    entering an infinite loop.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=781686

 src/lib/polari-room.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/src/lib/polari-room.c b/src/lib/polari-room.c
index aded5a1..d741e83 100644
--- a/src/lib/polari-room.c
+++ b/src/lib/polari-room.c
@@ -142,8 +142,11 @@ match_self_nick (PolariRoom *room,
   gboolean result = FALSE;
   int len;
 
-  folded_text = FOLDFUNC (text);
   len = strlen (priv->self_nick);
+  if (len == 0)
+    return FALSE;
+
+  folded_text = FOLDFUNC (text);
   match = MATCHFUNC (folded_text, priv->self_nick);
 
   while (match != NULL)