Switch to using plain int types for ASSI_Rect
Don't need a function prototype for msgCallback.

It's right there. Really.
Give header its own setter.
Simplify setScript.
Ensure currentScript != NULL in calculateBounds.
Remove ASSI_EXPORT declaration from C file.
Lengths are now size_t.
Update example to match new API.
Check a variable that actually exists.
Add SEARCH_BOUNDS define and bump it from 16 to 32.

It turns out that in certain cases with a large amount of blur,
checking the bottommost or rightmost 16 pixels isn't enough.

Bumping this to 32 fixes those cases while still avoiding exhaustively
searching huge rects.