[gnome-maps] facebookBackend: Check for property before use

[Marcus Lundblad <mlundblad src gnome org>]

commit 6f4deb925d8e04ace68963d0edff0a13ef6daf24
Author: Marcus Lundblad <ml update uu se>
Date:   Wed Nov 8 22:45:40 2017 +0100

    facebookBackend: Check for property before use
    
    https://bugzilla.gnome.org/show_bug.cgi?id=782861

 src/facebookBackend.js |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)
---
diff --git a/src/facebookBackend.js b/src/facebookBackend.js
index b1192e9..c01306f 100644
--- a/src/facebookBackend.js
+++ b/src/facebookBackend.js
@@ -57,7 +57,13 @@ var FacebookBackend = new Lang.Class({
     },
 
     isInvalidCall: function(restCall, data) {
-        return !data || data.error;
+        if (!data) {
+            return true;
+        } else if (data.error) {
+            return true;
+        } else {
+            return false;
+        }
     },
 
     getCallResultCode: function(restCall, data) {