[polari] entryArea: Check if pasted text is not null

[Kunal Jain <kunaljain src gnome org>]

commit 26e95fde94e5098109525b5e31f384d587e1084a
Author: Kunaal Jain <kunaalus gmail com>
Date:   Wed Feb 10 16:07:47 2016 +0530

    entryArea: Check if pasted text is not null
    
    We should check if text is null before pasting text,
    and emitting corresponding signals.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=760346

 src/entryArea.js |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/entryArea.js b/src/entryArea.js
index a4047d4..b54dd6c 100644
--- a/src/entryArea.js
+++ b/src/entryArea.js
@@ -35,6 +35,8 @@ const ChatEntry = new Lang.Class({
         let clipboard = Gtk.Clipboard.get_default(this.get_display());
         clipboard.request_text(Lang.bind(this,
             function(clipboard, text) {
+                if (text == null)
+                    return;
                text = text.trim();
 
                 let nLines = text.split('\n').length;