Fix closing a doc causes a crash sometimes

kate/katedocmanager.cpp

@@ -242,13 +242,10 @@ bool KateDocManager::closeDocuments(const QList<KTextEditor::Document *> &docume
 
         // really delete the document and its infos
         m_docInfos.erase(doc);
-        auto it = std::find(m_docList.begin(), m_docList.end(), doc);
-        if (it != m_docList.end()) {
-            delete *it;
+        delete m_docList.takeAt(m_docList.indexOf(doc));
+
         // document is gone, emit our signals
         Q_EMIT documentDeleted(doc);
-            m_docList.erase(it);
-        }
 
         last++;
     }

kate/kateviewspace.cpp

@@ -190,10 +190,7 @@ void KateViewSpace::tabBarToggled()
 KTextEditor::View *KateViewSpace::createView(KTextEditor::Document *doc)
 {
     // should only be called if a view does not yet exist
-    {
-        auto it = m_docToView.find(doc);
-        Q_ASSERT(it == m_docToView.end());
-    }
+    Q_ASSERT(m_docToView.find(doc) == m_docToView.end());
 
     /**
      * Create a fresh view