Fix Klocwork Issues - Return from int main()

Add return 0 for int main()

Signed-off-by: P Dheeraj Srujan Kumar <p.dheeraj.srujan.kumar@intel.com>
Change-Id: Ifa3216ae1b4cd0eb422679149ace6a1b59dbf85e
diff --git a/src/webserver_main.cpp b/src/webserver_main.cpp
index eaedc11..c01accd 100644
--- a/src/webserver_main.cpp
+++ b/src/webserver_main.cpp
@@ -139,4 +139,5 @@
     io->run();
 
     crow::connections::systemBus.reset();
+    return 0;
 }