Ignore unconfigured VCS

Change-Id: I4a63734793debfcb37283257bb7cbf4b1153197f
Reviewed-by: Christian Stenger <christian.stenger@digia.com>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/coreplugin/vcsmanager.cpp

@@ -226,8 +226,10 @@ IVersionControl* VcsManager::findVersionControlForDirectory(const QString &input
 
     foreach (IVersionControl * versionControl, versionControls) {
         QString topLevel;
-        if (versionControl->managesDirectory(directory, &topLevel))
+        if (versionControl->isConfigured()
+                && versionControl->managesDirectory(directory, &topLevel)) {
             allThatCanManage.push_back(StringVersionControlPair(topLevel, versionControl));
+        }
     }
 
     // To properly find a nested repository (say, git checkout inside SVN),