Allow adding sellers during sale phase

src/core/database.cpp

@@ -226,7 +226,7 @@ unsigned int Database::storeSellers(std::vector<std::unique_ptr<Seller>>& seller
                 rollbackTransaction();
                 std::string errMsg(sqlite3_errmsg(db_));
                 sqlite3_finalize(stmt);
-                sqlite3_ throw std::runtime_error(errMsg);
+                throw std::runtime_error(errMsg);
             }
             ++count;
             sqlite3_finalize(stmt);