build: Warnings correction for gcc 4.2

Also in this commit some code style corrections.

Change-Id: Idf2b5b96b328fb3dbea7440362c84d7759a10ec5
Refs: #1429
diff --git a/tests-integrated/wscript b/tests-integrated/wscript
index 98f6dab..4e99eb3 100644
--- a/tests-integrated/wscript
+++ b/tests-integrated/wscript
@@ -11,6 +11,7 @@
         source=bld.path.ant_glob(['**/*.cpp'],
                                  excl=['**/*-osx.cpp', '**/*-sqlite3.cpp']),
         use='ndn-cpp-dev',
+        includes='.',
         install_path=None,
         )