add ptr=nullptr back

Author: aminroosta

hdr/sqlite_modern_cpp.h

@@ -282,8 +282,10 @@ namespace sqlite {
 			sqlite3* tmp = nullptr;
 			auto ret = sqlite3_open16(db_name.data(), &tmp);
 			if(ret != SQLITE_OK) exceptions::throw_sqlite_error(ret);
-			_db = std::shared_ptr<sqlite3>(tmp, [=](sqlite3* ptr) { sqlite3_close_v2(ptr); });
-																	//_db.reset(tmp, sqlite3_close); // alternative close. (faster?)
+
+			_db = std::shared_ptr<sqlite3>(tmp, [=](sqlite3* ptr) { sqlite3_close_v2(ptr); }); // this will close the connection eventually when no longer needed.
+
+			//_db.reset(tmp, sqlite3_close); // alternative close. (faster?)
 		}
 
 		database(std::string const & db_name):