Windows: Incorrect mouse coordinates analysis (required for Superscope and Lua scripting)

[gocha]

There are so many resizing and filtering conditions. Moreover, SNES has some screen resolution conditions. It seems like that we sometimes fail to get the correct coordinates of the on-screen point in some cases.

Note: The official snes9x has the same problem.

Test Case

• [ ] No Stretch, No Filter
• [ ] No Stretch, Integer Scale Filter (Simple2X)
• [ ] No Stretch, Non-Integer Scale Filter (NTSC)
• [ ] Stretch (Aspect Ratio Free), No Filter
• [ ] Stretch (Aspect Ratio 8:7), No Filter
• [ ] Stretch (Aspect Ratio 4:3), No Filter
• [ ] Stretch (Aspect Ratio Free), NTSC Filter (One of Non-Integer Scale Filter)
• [ ] Stretch (Aspect Ratio 8:7), NTSC Filter (One of Non-Integer Scale Filter)
• [ ] Stretch (Aspect Ratio 4:3), NTSC Filter (One of Non-Integer Scale Filter)
• [ ] Input Resolution: HiRes
• [ ] Input Resolution: Interlaced
• [ ] Input Resolution: Height Extended