[polari] chatView: Fix updating status counts

[Florian Müllner <fmuellner src gnome org>]

commit 0f5f09a680b42ef366eb3537ed151b9814dbf691
Author: Florian Müllner <fmuellner gnome org>
Date:   Tue Nov 26 19:37:39 2019 +0100

    chatView: Fix updating status counts
    
    Commit a191adfb456 accidentally changed the check for a valid type
    ('left' or 'joined') into a check for 'type', whoops.
    
    https://gitlab.gnome.org/GNOME/polari/issues/115

 src/chatView.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/chatView.js b/src/chatView.js
index 47b22fb..67aae55 100644
--- a/src/chatView.js
+++ b/src/chatView.js
@@ -1127,7 +1127,7 @@ var ChatView = GObject.registerClass({
         let tags = [this._lookupTag('status')];
         let groupTag = null;
         if (grouped) {
-            if (this._statusCount.type !== undefined) {
+            if (this._statusCount[type] !== undefined) {
                 this._statusCount[type]++;
                 this._statusCount.total++;
             }