client: fix warning

client/Client.cc: In member function 'virtual void Client::ms_handle_remote_reset(Connection*)':
warning: client/Client.cc:7892:9: enumeration value 'STATE_NEW' not handled in switch [-Wswitch]
warning: client/Client.cc:7892:9: enumeration value 'STATE_OPEN' not handled in switch [-Wswitch]
warning: client/Client.cc:7892:9: enumeration value 'STATE_CLOSED' not handled in switch [-Wswitch]

Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: David Zafman <david.zafman@inktank.com>
common/Preforker: fix warning

common/Preforker.h: In member function ‘int Preforker::signal_exit(int)’:
warning: common/Preforker.h:82:45: ignoring return value of ‘ssize_t safe_write(int, const void*, size_t)’, declared with attribute warn_unused_result [-Wunused-result]

This is harder than it should be to fix.  :(
  http://stackoverflow.com/questions/3614691/casting-to-void-doesnt-remove-warn-unused-result-error

Whatever, I guess we can do something useful with this return value.

Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: David Zafman <david.zafman@inktank.com>