Fix catch fruit position getting randomised when last fruit has zero position

[frenzibyte]

• Resolves the first example of Object placements with HR do not match stable (osu!catch) #27425
• Needs diffcalc sheet cross-check

Stable code reference: https://github.com/peppy/osu-stable-reference/blob/3ea48705eb67172c430371dcfc8a16a002ed0d3d/osu!/GameplayElements/HitObjects/Fruits/HitFactoryFruits.cs#L45-L50

[bdach]

Spreadsheet: https://docs.google.com/spreadsheets/d/1PNDZckAVTv7aCEa61yfIKLpRnKJTJamBYq76RDg8J3k/edit#gid=821151723

[bdach]

Well, the case brought up in the issue looks fixed. I did a sampling of conversion mappings for the beatmaps shown in the spreadsheet (5 with biggest gains, 5 with biggest losses; among those 5 are: 3 HR, 1 HRDT, 1 HRHT) because I'm not doing them all by hand and it looks like while this won't fix all of them, it's an improvement for sure, so I'm going to call this good:

beatmap ID	mods	beatmap	status
67732	HR	Sakamoto Maaya - Loop (kodomonoyume) [Hard].osu	❌ still failing
2006563	HR	Perfume - STAR TRAIN (eiri-) [Connection].osu	❌ still failing
34736	HR	O-Zone - Dragostea Din Tei (Taiko Cut) (Zekira) [TaikOsu-Oni].osu	✅ fixed
67732	DT, HR	Sakamoto Maaya - Loop (kodomonoyume) [Hard].osu	❌ still failing
67732	HT, HR	Sakamoto Maaya - Loop (kodomonoyume) [Hard].osu	❌ still failing
326913	HR	Dark PHOENiX - Last Remote - Type gamma (sjoy) [L18's Normal].osu	✅ fixed
862777	HR	Sharlo - Eisou Youga ~Meikyou Shisui~ (Sharlo) [Normal].osu	❌ still failing
1803436	HR	Eve - Anoko Secret (Nevo) [hyper's Hard].osu	✅ fixed
1241727	DT, HR	Veritas Unae - ~DISK 1~ (100bit) [Hard].osu	✅ fixed
70086	HT, HR	Innocent Key - Lunatic Red Eyes (termerys) [Rox's Diff].osu	✅ fixed

Looking at the remaining failures they'll be related to the other known issues anyhow (i.e. probably slider velocity inaccuracies that spiral into fruits becoming not-hyper while they should be or hyper while they shouldn't).