example clients in rev508 do not connect

[Kevin DuBois]

regression in android, nex4/galaxynexus

root@localhost:~# ./mir_demo_client_accelerated
Starting
Connected
Surface created
mir_demo_client_accelerated: /home/kdub/source/mir/mir/examples/demo_client_accelerated.cpp:98: int main(int, char**): Assertion `mir_surface_is_valid(surface)' failed.

android clients do not connect. Last revision i got to work was 504

[Kevin DuBois (kdub)]

more detail, clients connect fine if input is enabled in the build

debian/rules has
  -DMIR_DISABLE_INPUT=YES

with input disabled, this is the problematic line where the server fails:
http://bazaar.launchpad.net/~mir-team/mir/trunk/view/head:/src/server/frontend/session_mediator.cpp#L117

[Kevin DuBois (kdub)]

addition of input fd in rev 505-508 caused builds with input disabled to throw on surface creation .
solution in: lp:~mir-team/mir/fix-surface-creation-when-input-disabled