CppEditor: Remove wrong "else"

Task-number: QTCREATORBUG-18331
Change-Id: Ia4221bce8cac7d781e9b32bc6142269089c4acce
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>

src/plugins/cppeditor/cppeditor.cpp

@@ -467,7 +467,7 @@ QList<ProjectPart::Ptr> fetchProjectParts(CppTools::CppModelManager *modelManage
 
     if (projectParts.isEmpty())
         projectParts = modelManager->projectPartFromDependencies(filePath);
-    else if (projectParts.isEmpty())
+    if (projectParts.isEmpty())
         projectParts.append(modelManager->fallbackProjectPart());
 
     return projectParts;