Bug: the compiler removes return statements sometimes

[cgytrus]

Describe the bug

a return at the end of an if statement with other code in it removes the return when compiled

Reproducing steps

1. Open a script (not sure if it works on the new functions thing, definitely works on legacy scripts)
2. Put the following code at the beginning:

if(some_var) {
    do_something()
    return;
}

3. Click away to compile the code
4. Observe the return disappear

Setup Details

1. commit 61d0f89
2. win10 latest
3. Will You Snail?

[Jacky720]

This occurs because scripts automatically decompile with an unnecessary return at the end and I wanted to ignore that return to match bytecode. Thus, it can be fixed at AssemblyWriter.cs#1019, but maintaining 1:1 compilation will require removing the unnecessary return generation. Not that that's a high priority.