Check that malloc didn't fail in MythSystemLegacyUnix. Coverity 1028695
Fix coverity 1196567. Wrapper object use after free.
Fix coverity 1025906 (again). Leak of hls on return (exit). Original fix missed a return point.
Fix coverity 1061552. Dereference after null check.
Don't ignore the return value of fcntl in ExternalIO (External Stream Handler). Coverity 1213709