Fix coverity issues #441

Job	Run time
run-checker (no-cmp)	13s
run-checker (no-cms)	10s
run-checker (no-ct)	12s
run-checker (no-dtls)	11s
run-checker (no-ec)	9s
run-checker (no-ec2m)	12s
run-checker (no-legacy)	12s
run-checker (no-sock)	9s
run-checker (no-srp)	10s
run-checker (no-srtp)	11s
run-checker (enable-ssl-trace)	16s
run-checker (no-tests)	8s
run-checker (no-threads)	12s
run-checker (no-tls)	11s
run-checker (no-tls1_2)	20s
run-checker (no-tls1_3)	11s
run-checker (enable-trace enable-fips)	12s
run-checker (enable-ntls)	10s
run-checker (no-ts)	11s
run-checker (no-ui)	18s
	3m 58s

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