fix off-center multiblock item lists

Author: TechLord22

src/main/java/gregtech/integration/jei/multiblock/MultiblockInfoRecipeWrapper.java

@@ -58,10 +58,10 @@
 import java.util.stream.Collectors;
 
 public class MultiblockInfoRecipeWrapper implements IRecipeWrapper {
-    private static final int MAX_PARTS = 20;
+    private static final int MAX_PARTS = 18;
     private static final int PARTS_HEIGHT = 36;
     private final int SLOT_SIZE = 18;
-    private final int SLOTS_PER_ROW = 10;
+    private final int SLOTS_PER_ROW = 9;
     private final int ICON_SIZE = 20;
     private final int RIGHT_PADDING = 5;
 
@@ -216,7 +216,7 @@ private void preparePlaceForParts(int recipeHeight) {
         IGuiItemStackGroup itemStackGroup = recipeLayout.getItemStacks();
 
         for (int i = 0; i < MAX_PARTS; ++i)
-            itemStackGroup.init(i, true, SLOT_SIZE * i - (SLOT_SIZE * SLOTS_PER_ROW) * (i / SLOTS_PER_ROW), recipeHeight - PARTS_HEIGHT + SLOT_SIZE * (i / SLOTS_PER_ROW));
+            itemStackGroup.init(i, true, SLOT_SIZE * i - (SLOT_SIZE * SLOTS_PER_ROW) * (i / SLOTS_PER_ROW) + (SLOT_SIZE/ 2) - 2, recipeHeight - PARTS_HEIGHT + SLOT_SIZE * (i / SLOTS_PER_ROW));
     }
 
     private void updateParts() {
@@ -243,7 +243,7 @@ public void drawInfo(@Nonnull Minecraft minecraft, int recipeWidth, int recipeHe
         this.infoIcon.draw(minecraft, recipeWidth - (ICON_SIZE + RIGHT_PADDING), 49);
 
         for (int i = 0; i < MAX_PARTS; ++i) {
-            this.slot.draw(minecraft, SLOT_SIZE * i - (SLOTS_PER_ROW * SLOT_SIZE) * (i / SLOTS_PER_ROW), sceneHeight + SLOT_SIZE * (i / SLOTS_PER_ROW));
+            this.slot.draw(minecraft, SLOT_SIZE * i - (SLOTS_PER_ROW * SLOT_SIZE) * (i / SLOTS_PER_ROW) + (SLOT_SIZE / 2) - 2, sceneHeight + SLOT_SIZE * (i / SLOTS_PER_ROW));
         }
 
         // Hmmm, the buttons need to be last otherwise sometimes highlighting