Fix EXC_BAD_ACCESS in FLEXNetworkObserver

[ahmedgomaa27]

the crash happened after I used FLEX and Firestore in my app, the root cause for it is trying to set error in Orig block and the error value is nil so we need to check on it first

[NSExceptional]

Passing nil to a function doesn't cause that error. I think orig may be nil or corrupted instead

[ahmedgomaa27]

@NSExceptional when i run XCode debugging , i found that error = nil

[NSExceptional]

Yes but that won't cause a crash, error is supposed to be nil unless there is an error

[ryanolsonk]

I've seen this one. The completion is optional so orig can (validly) be nil. We should just guard against trying to call it when that is the case.

[ahmedgomaa27]

@NSExceptional @ryanolsonk I updated the code now please check

[ryanolsonk]

Looks good to me, @NSExceptional ?

[NSExceptional]

Thanks!!

[ahmedgomaa27]

@NSExceptional will be a new version for this fix? as i need to upgrade current version