segfault with execAll

doing

``` js
var re = new Pcre( '.' );
re.execAll( "foobar" );
```

gives me 

```
node(1636,0x7fff7375e180) malloc: *** error for object 0x100000000: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug
Abort trap: 6
```

on NodeJS 0.10.32 and 0.10.33
