Unit artillery fix

core/src/mindustry/entities/bullet/ArtilleryBulletType.java

@@ -13,7 +13,7 @@ public class ArtilleryBulletType extends BasicBulletType{
         collidesTiles = false;
         collides = false;
         collidesAir = false;
-        scaleVelocity = true;
+        scaleLife = true;
         hitShake = 1f;
         hitSound = Sounds.explosion;
         hitEffect = Fx.flakExplosion;

core/src/mindustry/entities/bullet/BulletType.java

@@ -111,7 +111,7 @@ public class BulletType extends Content implements Cloneable{
     /** Whether velocity is inherited from the shooter. */
     public boolean keepVelocity = true;
     /** Whether to scale lifetime (not actually velocity!) to disappear at the target position. Used for artillery. */
-    public boolean scaleVelocity;
+    public boolean scaleLife;
     /** Whether this bullet can be hit by point defense. */
     public boolean hittable = true;
     /** Whether this bullet can be reflected. */

core/src/mindustry/entities/bullet/PointBulletType.java

@@ -13,7 +13,7 @@ public class PointBulletType extends BulletType{
      public float trailSpacing = 10f;
 
      public PointBulletType(){
-         scaleVelocity = true;
+         scaleLife = true;
          lifetime = 100f;
          collides = false;
          keepVelocity = false;