Blank/Comment lines at the beginning are considered "unsafe"

[YeldhamDev]

Godot version:
cf297b4

Issue description:
If a typed GDScript file starts with a blank line or a comment, these lines will be considered unsafe until it reaches a line of actual code.

[akien-mga]

Still reproducible in the current master branch.

[YeldhamDev]

@akien-mga I would consider this a bug rather than an enhancement request.

[akien-mga]

One can argue both ways (incomplete feature vs wrong behavior), but I'm fine changing it.

[YeldhamDev]

Doesn't happen anymore on master.