plugin crash depending on sys_var / show_var declaration order

I just had the weird effect that adding a STATUS variable to an already working audit plugin made the server crash on plugin_init()

After stripping things down I ended up with a minimal daemon plugin that only defines one status variable and two config variables.

The crash only happens if:

• st_mysql_sys_var declared before st_mysql_show_var
• at least two st_mysql_sys_var entries

If i comment out the 2nd sys_var entry or rearrange code
it doesn't crash anymore ...