correct where last damage gets cleared for gen 1 PS

src/lib/gen1/mechanics.zig

@@ -896,6 +896,9 @@ fn doMove(
     var hits: u4 = 1;
     var effectiveness = Effectiveness.neutral;
 
+    // Due to control flow shenanigans we need to clear last_damage for Pokémon Showdown
+    if (showdown and !counter) battle.last_damage = 0;
+
     // The cartridge handles set damage moves in applyDamage but we short circuit to simplify things
     if (move.effect == .SuperFang or move.effect == .SpecialDamage) {
         return specialDamage(battle, player, move, options);
@@ -956,9 +959,6 @@ fn doMove(
         }
     }
 
-    // Due to control flow shenanigans we need to clear last_damage for Pokémon Showdown
-    if (showdown and skip) battle.last_damage = 0;
-
     var zero = battle.last_damage == 0;
     miss = if (showdown or skip)
         miss

src/test/regression/fixtures/gen1/0xA31F27EAF9BF4E3B.input.log

@@ -0,0 +1,59 @@
+>start {"formatid":"gen1customgame@@@Endless Battle Clause,Sleep Clause Mod,Freeze Clause Mod","seed":[41759,10218,63935,20027]}
+>player p1 {"name":"Bot 1","team":"Weedle|||None|razorwind,slash,eggbomb,icebeam||200,126,188,93,93,82|N|5,12,23,18,18,13||70|211]Blastoise|||None|highjumpkick,acidarmor,dig,counter||206,111,13,192,192,100|N|0,28,29,25,25,28||92|159]Bulbasaur|||None|hyperbeam,absorb,psywave,swift||107,239,29,1,1,189|N|3,13,13,19,19,18||98|88]Arbok|||None|sing,horndrill,submission,poisonsting||100,121,81,123,123,241|N|9,26,16,2,2,29||57|67]Pidgeot|||None|bonemerang,psybeam,doublekick,firepunch||138,12,55,79,79,101|N|14,15,,12,12,19||99|107]Flareon|||None|doubleteam,flamethrower,hornattack,barrage||200,88,206,126,126,141|N|1,1,16,18,18,12||52|64"}
+>player p2 {"name":"Bot 2","team":"Arcanine|||None|scratch,furyswipes,skullbash,pinmissile||164,3,93,23,23,49|N|15,30,7,6,6,19||72|10]Omanyte|||None|sandattack,seismictoss,withdraw,lightscreen||60,152,138,29,29,117|N|10,14,8,13,13,19||50|178]Raichu|||None|aurorabeam,toxic,headbutt,megadrain||128,210,34,22,22,214|N|11,18,25,10,10,||84|16]Oddish|||None|stunspore,amnesia,growth,sonicboom||89,120,65,74,74,18|N|3,20,9,18,18,11||99|32]Primeape|||None|drillpeck,crabhammer,glare,hydropump||72,153,78,142,142,148|N|12,23,3,0,0,16||91|83]Magmar|||None|bodyslam,softboiled,disable,karatechop||108,35,113,94,94,28|N|11,10,5,23,23,15||71|77"}
+>p1 switch 2
+>p2 switch 2
+>p1 move highjumpkick
+>p2 move sandattack
+>p1 move acidarmor
+>p2 move seismictoss
+>p1 move dig
+>p2 move withdraw
+>p1 move dig
+>p2 switch 2
+>p1 switch 2
+>p2 move scratch
+>p1 switch 3
+>p2 move furyswipes
+>p1 move hyperbeam
+>p2 move skullbash
+>p1 move recharge
+>p2 move skullbash
+>p1 switch 4
+>p2 move pinmissile
+>p1 switch 5
+>p2 switch 3
+>p1 move bonemerang
+>p2 move aurorabeam
+>p2 switch 4
+>p1 move psybeam
+>p2 switch 5
+>p1 switch 6
+>p2 move drillpeck
+>p1 move doubleteam
+>p2 switch 6
+>p1 move flamethrower
+>p2 move bodyslam
+>p1 move hornattack
+>p2 move softboiled
+>p1 switch 2
+>p2 move disable
+>p1 move counter
+>p2 move karatechop
+>p1 move acidarmor
+>p2 switch 2
+>p1 move highjumpkick
+>p2 switch 2
+>p2 switch 5
+>p1 move highjumpkick
+>p2 move stunspore
+>p1 move acidarmor
+>p2 move amnesia
+>p1 move dig
+>p2 move growth
+>p1 move dig
+>p2 switch 3
+>p1 move highjumpkick
+>p2 move skullbash
+>p1 move counter
+>p2 move skullbash