Replace fallthrough comments with new SAL_FALLTHROUGH macro

...which (in LIBO_INTERNAL_ONLY) for Clang expands to [[clang::fallthrough]] in
preparation of enabling -Wimplicit-fallthrough.  (This is only relevant for
C++11, as neither C nor old C++ has a way to annotate intended fallthroughs.)

Could use BOOST_FALLTHROUGH instead of introducing our own SAL_FALLTHROUGH, but
that would require adding back in dependencies on boost_headers to many
libraries where we carefully removed any remaining Boost dependencies only
recently.  (At least make SAL_FALLTHROUGH strictly LIBO_INTERNAL_ONLY, so its
future evolution will not have any impact on the stable URE interface.)  C++17
will have a proper [[fallthroug]], eventually removing the need for a macro
altogether.

(cherry picked from commit 14cd5182c5f64c43581c82db8c958369152226ac)

Change-Id: I342a7610a107db7d7a344ea9cbddfd9714d7e9ca

1 files changed, 1 insertions, 1 deletions

diff --git a/sal/osl/unx/security.cxx b/sal/osl/unx/security.cxx
index 16a5f74cba36..75097d2d4361 100644
--- a/sal/osl/unx/security.cxx
+++ b/sal/osl/unx/security.cxx
@@ -132,7 +132,7 @@ oslSecurity SAL_CALL osl_getCurrentSecurity()
             if (found != nullptr) {
                 return p;
             }
-            /* fall through */
+            SAL_FALLTHROUGH;
         default:
             deleteSecurityImpl(p);
             return nullptr;