Correct v.blk_on in r.state s_block when gapsize = 0.

libraries/base/diag/src/vhdl/diag_block_gen.vhd

@@ -216,12 +216,11 @@ begin
             if v.eop = '1' and r.blk_en = '0' then
               v.state := s_idle;          -- accept disable after eop, not during block
             end if;
-            if v.eop = '1' then
+          end if;  -- out_siso.ready='1'
+          if r.eop = '1' then
             v.blk_xon := xon_reg;  -- accept XOFF after eop, not during block
           end if;
 
-          end if;  -- out_siso.ready='1'
-
         when s_gap => 
           if r.samples_cnt >= v_gapsize-1 and r.blocks_cnt >= v_blocks_per_sync-1 then 
             v.samples_cnt := 0;