make use of std::make_unique to test that MSVC2015 can handle that

apps/openmw/mwmechanics/aipackage.cpp

@@ -261,7 +261,7 @@ const MWMechanics::PathgridGraph& MWMechanics::AiPackage::getPathGridGraph(const
     CacheMap::iterator found = cache.find(id);
     if (found == cache.end())
     {
-        cache.insert(std::make_pair(id, std::unique_ptr<MWMechanics::PathgridGraph>(new MWMechanics::PathgridGraph(cell))));
+        cache.insert(std::make_pair(id, std::make_unique<MWMechanics::PathgridGraph>(MWMechanics::PathgridGraph(cell))));
     }
     return *cache[id].get();
 }

components/nifbullet/bulletnifloader.cpp

@@ -92,7 +92,6 @@ osg::ref_ptr<Resource::BulletShape> BulletNifLoader::load(const Nif::File& nif)
     if (findBoundingBox(node))
     {
         std::unique_ptr<btCompoundShape> compound (new btCompoundShape);
-
         std::unique_ptr<btBoxShape> boxShape(new btBoxShape(getbtVector(mShape->mCollisionBoxHalfExtents)));
         btTransform transform = btTransform::getIdentity();
         transform.setOrigin(getbtVector(mShape->mCollisionBoxTranslate));

components/vfs/bsaarchive.cpp

@@ -10,10 +10,10 @@ BsaArchive::BsaArchive(const std::string &filename)
     Bsa::BsaVersion bsaVersion = Bsa::CompressedBSAFile::detectVersion(filename);
 
     if (bsaVersion == Bsa::BSAVER_COMPRESSED) {
-        mFile = std::unique_ptr<Bsa::CompressedBSAFile>(new Bsa::CompressedBSAFile());
+        mFile = std::make_unique<Bsa::CompressedBSAFile>(Bsa::CompressedBSAFile());
     }
     else {
-        mFile = std::unique_ptr<Bsa::BSAFile>(new Bsa::BSAFile());
+        mFile = std::make_unique<Bsa::BSAFile>(Bsa::BSAFile());
     }
 
     mFile->open(filename);