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.

Change-Id: I342a7610a107db7d7a344ea9cbddfd9714d7e9ca

1 files changed, 3 insertions, 3 deletions

diff --git a/filter/source/graphicfilter/ipbm/ipbm.cxx b/filter/source/graphicfilter/ipbm/ipbm.cxx
index 58d376ed564e..7cdc3e1cd795 100644
--- a/filter/source/graphicfilter/ipbm/ipbm.cxx
+++ b/filter/source/graphicfilter/ipbm/ipbm.cxx
@@ -156,7 +156,7 @@ bool PBMReader::ImplReadHeader()
     {
         case '1' :
             mbRaw = false;
-            //fall-through
+            SAL_FALLTHROUGH;
         case '4' :
             mnMode = 0;
             nMax = 2;               // number of parameters in Header
@@ -164,14 +164,14 @@ bool PBMReader::ImplReadHeader()
             break;
         case '2' :
             mbRaw = false;
-            //fall-through
+            SAL_FALLTHROUGH;
         case '5' :
             mnMode = 1;
             nMax = 3;
             break;
         case '3' :
             mbRaw = false;
-            //fall-through
+            SAL_FALLTHROUGH;
         case '6' :
             mnMode = 2;
             nMax = 3;