[Database] Set multi statements off when returning early (#3462)

common/dbcore.cpp

@@ -365,6 +365,8 @@ MySQLRequestResult DBcore::QueryDatabaseMulti(const std::string &query)
 				mysql_free_result(res);
 			}
 
+			SetMultiStatementsOff();
+
 			return r;
 		}
 	}
@@ -418,6 +420,8 @@ MySQLRequestResult DBcore::QueryDatabaseMulti(const std::string &query)
 			r.SetErrorMessage(error_message);
 			r.SetErrorNumber(mysql_errno(mysql));
 
+			SetMultiStatementsOff();
+
 			// we handle errors elsewhere
 			return r;
 		}