fixed unix build bustage. LO_BUILTIN requires #define SHACK and lo_ele.h

lib/layout/layout.c

@@ -18,6 +18,7 @@
 
 
 #include "xp.h"
+#include "lo_ele.h"
 #include "net.h"
 #include "glhist.h"
 #include "shist.h"
@@ -7587,10 +7588,12 @@ void lo_UpdateStateWhileFlushingLine( MWContext *context, lo_DocState *state )
 		    layer = tptr->lo_java.layer;
 		    border_width = tptr->lo_java.border_width;
 		    break;
+#ifdef SHACK
 		  case LO_BUILTIN:
 		    layer = tptr->lo_builtin.layer;
 		    border_width = tptr->lo_builtin.border_width;
 		    break;
+#endif
 #endif
 		  case LO_EMBED:
 		    layer = tptr->lo_embed.layer;