Fix gcc-7 warnings.

- Mostly missing fall thru comments
- And uninitialized value used in sslapitest.c

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3440)

1 files changed, 1 insertions, 0 deletions

diff --git a/apps/engine.c b/apps/engine.c
index da1d91898b..1ead525fb8 100644
--- a/apps/engine.c
+++ b/apps/engine.c
@@ -311,6 +311,7 @@ int engine_main(int argc, char **argv)
             break;
         case OPT_TT:
             test_avail_noise++;
+            /* fall thru */
         case OPT_T:
             test_avail++;
             break;