Fix compile warning and typo in WDMClient

[erjiaqing]

No description provided.

[codecov-io]

Codecov Report

Merging #639 (913a0e6) into master (1dd59be) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #639      +/-   ##
==========================================
+ Coverage   70.03%   70.04%   +0.01%     
==========================================
  Files         483      483              
  Lines       87094    87094              
==========================================
+ Hits        60995    61005      +10     
+ Misses      26099    26089      -10     

Impacted Files	Coverage Δ
src/device-manager/WeaveDataManagementClient.cpp	59.18% <100.00%> (ø)
src/lib/support/ASN1Writer.cpp	86.52% <0.00%> (-0.87%)	⬇️
src/lib/profiles/security/WeaveToX509.cpp	87.91% <0.00%> (-0.26%)	⬇️
src/lib/profiles/security/WeaveCASEEngine.cpp	92.57% <0.00%> (-0.24%)	⬇️
src/test-apps/TestCASE.cpp	96.12% <0.00%> (+0.22%)	⬆️
src/inet/TCPEndPoint.cpp	51.32% <0.00%> (+0.23%)	⬆️
src/test-apps/ToolCommon.cpp	57.84% <0.00%> (+0.31%)	⬆️
src/lib/core/WeaveFabricState.cpp	59.76% <0.00%> (+0.35%)	⬆️
src/lib/core/WeaveMessageLayer.cpp	72.61% <0.00%> (+0.59%)	⬆️
src/lib/core/WeaveConnectionTunnel.cpp	83.54% <0.00%> (+1.26%)	⬆️

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[yunhanw-google]

thanks