examples/tls_server: fix svace warning
examples/tls_server: fix svace warning

This commit fixes svace warning about UNREACHABLE_CODE.

Change-Id: I5937a681e34fa29195026f64a4260a1c4fb2de01
Signed-off-by: Joohwan Kim <d8eb2057d34b4ed71c8b9c3943d864bbf0a7d8e6@samsung.com>

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