Fix spilling effects improperly handling partial stacks at higher levels

src/main/java/slimeknights/tconstruct/library/modifiers/spilling/SpillingFluid.java

@@ -30,6 +30,11 @@ public boolean hasEffects() {
     return !effects.isEmpty();
   }
 
+  /** Gets the amount of fluid needed for a single level */
+  public int getAmount(FluidStack fluid) {
+    return ingredient.getAmount(fluid.getFluid());
+  }
+
   /**
    * Applies any effects for the given recipe
    * @param fluid    Fluid used to perform the recipe, safe to modify
@@ -38,11 +43,11 @@ public boolean hasEffects() {
    * @return  Fluid stack after applying this recipe
    */
   public FluidStack applyEffects(FluidStack fluid, int level, ToolAttackContext context) {
-    int needed = ingredient.getAmount(fluid.getFluid());
-    int maxFluid = level * needed;
+    int amountPerLevel = getAmount(fluid);
+    int maxFluid = amountPerLevel * level;
     float scale = level;
     if (fluid.getAmount() < maxFluid) {
-      scale = fluid.getAmount() / (float)maxFluid;
+      scale = fluid.getAmount() / (float)amountPerLevel;
     }
     for (ISpillingEffect effect : effects) {
       effect.applyEffects(fluid, scale, context);