RecyclableLongList.Remove & .RemoveAt fixed to correctly set _lastBlockWithData to -1, when we remove the last item.

Recyclable.Collections/RecyclableLongList.cs

@@ -921,10 +921,7 @@ namespace Recyclable.Collections
 
 				if (_nextItemIndex > 0)
 				{
-					if (--_nextItemIndex == 0)
+					_nextItemIndex--;
-					{
-						_lastBlockWithData--;
-					}
 				}
 				else
 				{
@@ -932,6 +929,11 @@ namespace Recyclable.Collections
 					_nextItemBlockIndex--;
 				}
 
+				if (_nextItemIndex == 0)
+				{
+					_lastBlockWithData--;
+				}
+
 				if (NeedsClearing)
 				{
 #nullable disable
@@ -987,10 +989,7 @@ namespace Recyclable.Collections
 
 			if (_nextItemIndex > 0)
 			{
-				if (--_nextItemIndex == 0)
+				_nextItemIndex--;
-				{
-					_lastBlockWithData--;
-				}
 			}
 			else
 			{
@@ -998,6 +997,11 @@ namespace Recyclable.Collections
 				_nextItemBlockIndex--;
 			}
 
+			if (_nextItemIndex == 0)
+			{
+				_lastBlockWithData--;
+			}
+
 			if (NeedsClearing)
 			{
 #nullable disable
@@ -1023,10 +1027,7 @@ namespace Recyclable.Collections
 
 			if (_nextItemIndex > 0)
 			{
-				if (--_nextItemIndex == 0)
+				_nextItemIndex--;
-				{
-					_lastBlockWithData--;
-				}
 			}
 			else
 			{
@@ -1034,6 +1035,11 @@ namespace Recyclable.Collections
 				_nextItemBlockIndex--;
 			}
 
+			if (_nextItemIndex == 0)
+			{
+				_lastBlockWithData--;
+			}
+
 			if (NeedsClearing)
 			{
 #nullable disable