[Contact] Check instance if it is not null.

[Verification] Code compiles. TCT pass rate 100%
Issue: http://168.219.209.56/jira/browse/XWALK-803

Change-Id: I205033624ca6353385aa8b1a7ec8421f007217be
Signed-off-by: Tomasz Marciniak <t.marciniak@samsung.com>

diff --git a/src/contact/addressbook.cc b/src/contact/addressbook.cc
index 2882a11210c1d694ab8e7921f961483069cf6f88..461b5279d0dab4175e1775dff2c71b0763b224c3 100755 (executable)
--- a/src/contact/addressbook.cc
+++ b/src/contact/addressbook.cc
@@ -721,6 +721,10 @@ void AddressBookListenerCallback(const char* view_uri, void* user_data) {
   }
 
   ContactInstance* instance = static_cast<ContactInstance*>(user_data);
+  if (!instance) {
+    LoggerE("instance is NULL");
+    return;
+  }
 
   for (int version = instance->current_state(); version < current_version; ++version) {
     int latest_version = 0;