fix off by one error in reorg

lbry/wallet/server/block_processor.py

@@ -505,7 +505,6 @@ class BlockProcessor:
         undo_entry_len = 12 + HASHX_LEN
 
         for tx, tx_hash in reversed(txs):
-            self.db.total_transactions.pop()
             for idx, txout in enumerate(tx.outputs):
                 # Spend the TX outputs.  Be careful with unspendable
                 # outputs - we didn't save those in the first place.
@@ -523,6 +522,8 @@ class BlockProcessor:
                 self.utxo_cache[txin.prev_hash + s_pack('<H', txin.prev_idx)] = undo_item
                 self.touched.add(undo_item[:-12])
 
+            self.db.total_transactions.pop()
+
         assert n == 0
         self.tx_count -= len(txs)