bat: reset fallspeed on death

This prevents conflicts in setting the bats' Y position during the
death animation, which itself manages Y shift during the bounce.

Resolves LostArtefacts#992.

CHANGELOG.md

@@ -26,6 +26,7 @@
 - fixed the remember played music option always being enabled (#1249, regression since 2.16)
 - fixed the underwater SFX playing for one frame at the start of Palace Midas (#1251)
 - fixed an incorrect frame in Lara's underwater twist animation (OG bug in TR2 onwards) (#1242)
+- fixed flickering in bats' death animations and rapid shooting if Lara continues to fire when they are killed (#992)
 
 ## [3.1.1](https://github.com/LostArtefacts/TR1X/compare/3.1...3.1.1) - 2024-01-19
 - changed quick load to show empty passport instead of opening the save game menu when there are no saves (#1141)

README.md

@@ -316,6 +316,7 @@ Not all options are turned on by default. Refer to `TR1X_ConfigTool.exe` for det
 - fixed various bugs with falling movable blocks
 - fixed bugs when trying to stack multiple movable blocks
 - fixed Midas's touch having unrestricted vertical range
+- fixed flickering in bats' death animations and rapid shooting if Lara continues to fire when they are killed
 
 #### Cheats
 - added a fly cheat

src/game/objects/creatures/bat.c

@@ -108,6 +108,7 @@ void Bat_Control(int16_t item_num)
             item->speed = 0;
         } else {
             item->gravity_status = 0;
+            item->fall_speed = 0;
             item->goal_anim_state = BAT_DEATH;
             item->pos.y = item->floor;
         }