Cleaned up a few more slot machine layouts, fixed editing error in m5bbro.lay.

src/devices/sound/namco_163.cpp

@@ -138,7 +138,7 @@ void namco_163_sound_device::data_w(u8 data)
 u8 namco_163_sound_device::data_r()
 {
 	const u8 val = m_ram[m_addr];
-	if ((!machine().side_effects_disabled()) && m_inc)
+	if (!machine().side_effects_disabled() && m_inc)
 		m_addr = (m_addr + 1) & 0x7f;
 
 	return val;