Silence output stream write error

[NicoleYarroch]

Bug Report

In the the SDLIAPSession class, the sdl_dequeueAndWriteToOutputStream method attempts to write to the output stream even if the output stream has no space available. This produces the warning

332 failed to write because stream does not have space available

To silence this warning, the sdl_dequeueAndWriteToOutputStream method should check if the ostream has space available before attempting to write. If it does not, the method should return.

- (void)sdl_dequeueAndWriteToOutputStream {
    NSOutputStream *ostream = self.easession.outputStream;
    if (!ostream.hasSpaceAvailable) {
         return;
    }
   ...
}

Reproduction Steps

1. Connect the SDL_iOS example app to a TDK
2. Open the app on the TDK

Expected Behavior

There should be no output stream write errors in the debug logs.

Observed Behavior

There are output stream write errors in the debug logs.

OS & Version Information

• iOS Version: 11.2.2
• SDL iOS Version: 5.1.1
• Testing Against: TDK (SYNC 3)

[NicoleYarroch]

This error started appearing on iOS v 11.2