BRUSSELS — Political infighting over the use of Brussels funds to build border barriers and deportation centers in third countries has derailed a broader agreement on next year’s budget. EU lawmakers rejected a budget resolution in the Parliament on Wednesday by a vote of 360 to 233. The defeat won’t directly impact upcoming budget negotiations with national capitals, as it only concerned an explanation of the budget figures demanded by the Parliament. The figures themselves were approved in a separate vote. Still, it is feared that the party divisions exposed by the failed resolution send a signal of disunity ahead…