While working on [reproducible builds](https://reproducible-builds.org/) for [openSUSE](https://en.opensuse.org/openSUSE:Reproducible_Builds), I found that our `glfw` package varies in every build since the upgrade to geany-2.0

I extracted this minimal reproducer:

```bash cat > test2.c <<EOF typedef struct { struct { } __value32; } __atomic_wide_counter; EOF for i in 1 2 ; do geany -g glfw.c.tags test2.c ; md5sum glfw.c.tags ; done | sort -u | wc -l 2 ```

The output differs thusly: ```diff -__value32�64�__atomic_wide_counter�0�__anonceed23430108::anon_struct_1 +__value32�64�__atomic_wide_counter�0�__anone35807a60108::anon_struct_1 ```

I think, there is the same problem with anon unions.

Please make output deterministic.