Update to 3.3.19
    
    - New upstream release 3.3.19
      - more sanity checking in vcd2fst to prevent crashes on malformed files
      - rewrote support for compressed signal handling (FST only)
      - shmidcat now exits on EOF
      - added sys_fst.c VPI source for NC Verilog and XL
      - added component typename dumping into sys_fst.c so that NC can dump
        component names
      - added component type names in gtk2 tree (only used by FST so far)
      - memory usage improvements on 64-bit architectures
      - fixed top/bottom pane resizing bug after reload in SST window
      - fixed crashes in hierarchy search widget for GHW where standard, textio,
        std_logic_1164, etc. were selectable
      - fixed reload scroll position for bottom TreeView in SST window