Static analysis fixes #28

Job	Run time
build (large_rw, wolfssh-windows-build-large-rw)	1m 29s
build (basic, wolfssh-windows-build)	1m 34s
test (large_rw, wolfssh-windows-build-large-rw)	9m 46s
test (basic, wolfssh-windows-build)	37s
	13m 26s

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