Crashed when run examples/06echo.strm

[Jack Drogon]

@matz
See below

console1 $: bin/streem examples/06echo.strm
[1]    26445 segmentation fault (core dumped)  bin/streem examples/06echo.strm

console2 $: nc localhost 8007

Git commit: 39533e7
System: Mac OSX 10.11
Clang: clang-703.0.29

or

System: CentOS7
GCC: 4.8.5