Git: Fix inotify_add warnings

Dont try to watch submodule index files. For now we dont support it

addons/project/gitwidget.h

@@ -63,6 +63,15 @@ public:
         return m_activeGitDirPath;
     }
 
+    QString indexPath() const
+    {
+        if (m_activeGitDirPath == m_topLevelGitPath) {
+            return m_activeGitDirPath + QStringLiteral(".git/index");
+        }
+        // Should we support submodules?
+        return QString();
+    }
+
 private:
     /** These ends with "/", always remember this */
 

addons/project/kateprojectpluginview.cpp

@@ -791,7 +791,7 @@ void KateProjectPluginView::slotUpdateStatus(bool visible)
     if (auto widget = static_cast<GitWidget *>(m_stackedGitViews->currentWidget())) {
         // To support separate-git-dir always use dotGitPath
         // We need to add the path every time again because it's always a different file
-        m_gitChangedWatcher.addPath(widget->dotGitPath() + QStringLiteral(".git/index"));
+        m_gitChangedWatcher.addPath(widget->indexPath());
         widget->updateStatus();
     }
 }