Fixed warning in css example and some minor cleanup

[jwillemsen]

* examples/ccs/client.cpp:
* examples/ccs/server.cpp:
* examples/ccs/server.h:

[codecov]

Codecov Report

Merging #198 (17ff66a) into master (b8b8519) will not change coverage.
The diff coverage is 0.00%.

@@           Coverage Diff           @@
##           master     #198   +/-   ##
=======================================
  Coverage   59.45%   59.45%           
=======================================
  Files         570      570           
  Lines       47338    47338           
  Branches     4166     4166           
=======================================
  Hits        28144    28144           
  Misses      16143    16143           
  Partials     3051     3051           

Impacted Files	Coverage Δ
examples/ccs/client.cpp	69.54% <ø> (ø)
examples/ccs/server.cpp	0.00% <0.00%> (ø)
examples/ccs/server.h	0.00% <0.00%> (ø)

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