src: Enabling -Werror in debug mode and some style updates

Several important warnings are still getting suppressed, because of
CryptoPP library

Change-Id: I8fb3d938544ecc38c65529262504dc753124bafd
diff --git a/tools/ndnputchunks3.cpp b/tools/ndnputchunks3.cpp
index 3822ae0..bb6435b 100644
--- a/tools/ndnputchunks3.cpp
+++ b/tools/ndnputchunks3.cpp
@@ -129,7 +129,7 @@
             {
               std::cerr << "ERROR: " << e.what() << std::endl;
               // and keep going
-              sleep (1);
+              sleep(1);
             }
         }
     }