Luke Wilde 1fc6bbcdc3 LibJS: Stop generating switch case statements on block termination ...

After we terminate a block (e.g. break, continue), we cannot generate
anymore bytecode for the block. This caused us to crash with this
example code:
```
a = 0;
switch (a) {
    case 0:
        break;
        console.log("hello world");
}
```
Anything after a block terminating instruction is considered
unreachable code, so we can safely skip any statements after it.

2022-03-15 11:57:51 +03:30

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