contactmodel: avoid invalid contact when searching existing sip contacts

Gitlab: #462
Change-Id: I8c4dcf6b50815d26e7ce89eccd87c6c2302215d2

src/contactmodel.cpp

@@ -479,10 +479,11 @@ ContactModelPimpl::searchSipContact(const URI& query)
         return;
     }
 
-    auto& temporaryContact = searchResult[query];
     {
         std::lock_guard<std::mutex> lk(contactsMtx_);
         if (contacts.find(uriID) == contacts.end()) {
+            auto& temporaryContact = searchResult[query];
+
             temporaryContact.profileInfo.uri = uriID;
             temporaryContact.profileInfo.alias = uriID;
             temporaryContact.profileInfo.type = profile::Type::TEMPORARY;