Fix 'got unknown message type 1 from Nix daemon'

Example:

  $ nix-build -E 'with import <nixpkgs> {}; runCommand "foo" { x = runCommand "bar" {} "exit 1"; } "echo foo; exit 1"'
  warning: unknown setting 'auto-allocate-uids'
  these 2 derivations will be built:
    /nix/store/v4fbdbhcdi949929a67g8farwf72zgam-bar.drv
    /nix/store/k4fsvrjl7cp2xpz7927iv7g0dqj1zyhs-foo.drv
  warning: unknown setting 'auto-allocate-uids'
  building '/nix/store/v4fbdbhcdi949929a67g8farwf72zgam-bar.drv'...
  error: --- Error ----------------------------------------------------------------------------------------------------------------------------------------------------------------- nix-daemon
  builder for '/nix/store/v4fbdbhcdi949929a67g8farwf72zgam-bar.drv' failed with exit code 1
  error: --- Error ------------------------------------------------------------------------------------------------------------------------------------------------------------------ nix-build
  got unknown message type 1 from Nix daemon

src/libstore/daemon.cc

@@ -81,7 +81,7 @@ struct TunnelLogger : public Logger
         showErrorInfo(oss, ei, false);
 
         StringSink buf;
-        buf << STDERR_NEXT << oss.str() << "\n";
+        buf << STDERR_NEXT << oss.str();
         enqueueMsg(*buf.s);
     }
 

src/libutil/logging.cc

@@ -81,7 +81,6 @@ public:
 
         log(ei.level, oss.str());
     }
-    
 
     void startActivity(ActivityId act, Verbosity lvl, ActivityType type,
         const std::string & s, const Fields & fields, ActivityId parent)