Fix EntityPickupItemEvent getRemaining / PlayerInventory#canHold

Without this change the calculation of fitting items was incorrect, so event.getRemaining() did return 0 when it should not be 0.

By: Brokkonaut <hannos17@gmx.de>

paper-server/nms-patches/PlayerInventory.patch

@@ -66,7 +66,7 @@
      public PlayerInventory(EntityHuman entityhuman) {
          this.items = NonNullList.a(36, ItemStack.a);
          this.armor = NonNullList.a(4, ItemStack.a);
-@@ -42,6 +94,23 @@
+@@ -42,6 +94,22 @@
          return itemstack.getItem() == itemstack1.getItem() && ItemStack.equals(itemstack, itemstack1);
      }
  
@@ -77,8 +77,7 @@
 +            ItemStack itemstack1 = this.getItem(i);
 +            if (itemstack1.isEmpty()) return itemstack.getCount();
 +
-+            // Taken from firstPartial(ItemStack)
-+            if (!this.a(itemstack, itemstack1)) {
++            if (this.a(itemstack1, itemstack)) { // PAIL rename isSimilarAndNotFull
 +                remains -= (itemstack1.getMaxStackSize() < this.getMaxStackSize() ? itemstack1.getMaxStackSize() : this.getMaxStackSize()) - itemstack1.getCount();
 +            }
 +            if (remains <= 0) return itemstack.getCount();
@@ -90,7 +89,7 @@
      public int getFirstEmptySlotIndex() {
          for (int i = 0; i < this.items.size(); ++i) {
              if (((ItemStack) this.items.get(i)).isEmpty()) {
-@@ -502,7 +571,7 @@
+@@ -502,7 +570,7 @@
      }
  
      public int getMaxStackSize() {
@@ -99,7 +98,7 @@
      }
  
      public boolean b(IBlockData iblockdata) {
-@@ -554,6 +623,11 @@
+@@ -554,6 +622,11 @@
      }
  
      public ItemStack getCarried() {