Documented boolean uses

src/battle_anim_electric.c

@@ -571,7 +571,7 @@ static void AnimSparkElectricity(struct Sprite *sprite)
 
 static void AnimZapCannonSpark(struct Sprite *sprite)
 {
-    InitSpritePosToAnimAttacker(sprite, 1);
+    InitSpritePosToAnimAttacker(sprite, TRUE);
     sprite->data[0] = gBattleAnimArgs[3];
     sprite->data[1] = sprite->x;
     sprite->data[2] = GetBattlerSpriteCoord(gBattleAnimTarget, BATTLER_COORD_X_2);