Local labels are incorrectly detected in call statement when mixed with other call/jump statements)

[hsandt]

Take this simple flow:

label scene1:
    # menu is just to give a concrete example
    # but even without it, you can reproduce the bug
    menu:
        "A":
            jump .a
        "B":
            jump .b
    return

label .a:
    return

label .b:
    return

It generates the following graph (passing -hide-screens to simplify):

Now replace the second jump with a call:

    menu:
        "A":
            jump .a
        "B":
            call .b
    return

The path to .b is now missing.

Now use call on first statement only:

    menu:
        "A":
            call .a
        "B":
            jump .b
    return

This time, the path to .a is missing.

Finally, use call everywhere:

    menu:
        "A":
            call .a
        "B":
            call .b
    return

and nothing appears.