#16 Some non-null string serialization

Check code and if these are known issues.

```
tc_types03: FAIL: RecursiveArray (dynamic initializer)
tc_types03: FAIL: RecursiveList (dynamic initializer)
tc_types03: FAIL: RecursiveList (var)
*** Error in `hyve': free(): invalid pointer: 0x082ba310 ***
Abort
[1] <main> (/home/johnny/Hyve/test/language/tc_types03.hyve:1)

  ...
  137482220: FREE_WR 4 0 0 0
  137482240: FREE_WR 8 0 0 0
  137482260: FREE_WR 12 0 0 0
  137482280: FREE_WR 16 0 0 0
> 137482300: FREE_WR 20 0 0 0
  137482320: STOP


tc_update01: OK
tc_update02: OK
/home/johnny/Hyve/test/language/tc_update03.hyve:24:26 error: one or more expressions in the update statement are not of a reference type near ';'
/home/johnny/Hyve/test/language/tc_update03.hyve: parsed with errors (1 errors, 0 warnings)
/home/johnny/Hyve/test/language/tc_update04.hyve:11:5: syntax error (near token '->').
```