Merge branch 'dev/scott/gcc7warn' into 'master'

Fix a couple gcc7 compilation warnings

See merge request !339

GaudiKernel/GaudiKernel/StreamBuffer.h

@@ -610,7 +610,7 @@ inline void StreamBuffer::swapToBuffer(const void* source, int siz)   {
     ::_swab (src, buff, siz);
 #endif
     src = buff;
-    /* no break */
+    /* FALLTHROUGH */
   case NOSWAP:
     std::copy_n(src,siz,tar);
     break;

GaudiKernel/src/Lib/EventSelectorDataStream.cpp

@@ -86,7 +86,7 @@ StatusCode EventSelectorDataStream::initialize()
     case 'C':
       svc    = "EvtTupleSvc";
       isData = false;
-    /* no break */
+      /* FALLTHROUGH */
     case 'E':
       hash = attrib.value.find( '#' );
       if ( hash > 0 ) {