call: Indicate to caller when callee quits to prevent lock-up

[tamaskoloti]

If a caller successfully initiates a call and the callee quits before processing it or sending the reply, it can only be interrupted by a signal.

This commit modifies fusion_call_destroy_all() to indicate to caller when the callee quits, so it can interrupt the call.

Signed-off-by: Tamas Koloti [email protected]