Control wires are not correctly displayed

[delapuente]

@nkanazawa1989 noted:

Summary

• Bug fix for conditional gate when multiple classical registers are included.
• Modify the appearance of classical-bit related gates to one in latex_circuit_drawer.

Steps to reproduce

The bug reported in Slack:
e.g.

qreg = QuantumRegister(3, name='q')
creg1 = ClassicalRegister(3, name='c1')
creg2 = ClassicalRegister(2, name='c2')
qc = QuantumCircuit(qreg, creg1, creg2)

qc.measure(qreg, creg1)
qc.x(qreg[0]).c_if(creg1, 3)

Expected behaviour

The conditional only involves the classical register named c1.

Current behaviour