fix(3p/nix): Fix incorrectly braced conditionals and loops

Fixes mistakes introduced by clang-tidy in the previous commit.

third_party/nix/src/nix-daemon/nix-daemon.cc

@@ -305,9 +305,8 @@ static void performOp(TunnelLogger* logger, ref<Store> store, bool trusted,
         ParseSink sink; /* null sink; just parse the NAR */
         parseDump(sink, savedNAR);
       } else {
-        parseDump
+        parseDump(savedRegular, from);
       }
-      (savedRegular, from);
 
       logger->startWork();
       if (!savedRegular.regular) throw Error("regular file expected");