[Tinycc-devel] Patch: Allow declared arrays to be initialized without an explicit size

[Arthur Williams]

The following example used to not compile (error: incompatible types for redefinition of 'array')
```
    extern int array[2];
    int array[] = {1};
```

Now it will compile as if `int array[2] = {1};` was used.

Unit tests were added to cover this case and also to ensure that `int array[] = {1,2,3};` would still be invalid with the initial declaration.