See script directory for method. The script to run in the top level
MaxScale directory is called maxscale-uncrustify.sh, which uses
another script, list-src, from the same directory (so you need to set
your PATH). The uncrustify version was 0.66.
The value was unconditionally dereferenced even if the data type did not
have metadata. In this case the pointer would point to unallocated memory
which can lead to a crash.
