Static code analysis fixes #91

Job	Run time
build (large_rw, wolfssh-windows-build-large-rw)	1m 40s
build (basic, wolfssh-windows-build)	1m 34s
test (large_rw, wolfssh-windows-build-large-rw)	7m 58s
test (basic, wolfssh-windows-build)	34s
	11m 46s

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