'Socket not connected' incorrectly leads to FAILED connection state rather than DISCONNECTED

[SimonWoolf]

From https://app.intercom.io/a/apps/ua39m1ld/inbox/all/conversations/5776825348, happens if they disconnect from the internet.

2016-08-26 16:22:43.661 GetSetClean[5322:345395] DEBUG: (ARTWebSocketTransport.m:295) R:0x7f8f4d8e5ab0 WS:0x7f8f4b6b0f90 websocket did receive error Error Domain=NSPOSIXErrorDomain Code=57 "Socket is not connected"
2016-08-26 16:22:43.662 GetSetClean[5322:345395] DEBUG: (ARTRealtime.m:756) R:0x7f8f4d8e5ab0 realtime transport failed: <ARTRealtimeTransportError: 0x7f8f4b06a090 {
type: Other
badResponseCode: 0
url: /?key=AvM5bQ.oXRTGw:nRccq-fq_HBE05WQ&echo=true&format=msgpack&v=0.8 -- wss://realtime.ably.io:443
error: Error Domain=NSPOSIXErrorDomain Code=57 "Socket is not connected"
}>
2016-08-26 16:22:43.663 GetSetClean[5322:345395] DEBUG: (ARTRealtime.m:212) R:0x7f8f4d8e5ab0 transition to Failed requested
2016-08-26 16:22:43.663 GetSetClean[5322:345395] failed! ARTErrorInfo with code 0, message: Error Domain=NSPOSIXErrorDomain Code=57 "Socket is not connected"
2016-08-26 16:22:43.664 GetSetClean[5322:345395] DEBUG: (ARTWebSocketTransport.m:62) R:0x0 WS:0x7f8f4b6b0f90 dealloc

[tcard]

Turns out I already fixed in #444 and git just happily merged the two identical-except-for-line-order fixes. I reverted #472.