dcrpg: exclude tspend from coin supply query

This makes the coin supply query for the charts not include tspends.

To apply this fix it is necessary to delete chartscache.gob after
shutting down. The next startup will rebuild all the charts data
from scratch, which will take several minutes.

db/dcrpg/internal/vinoutstmts.go

@@ -154,14 +154,14 @@ const (
 		WHERE tx_hash = $5 AND tx_index = $6 AND tx_tree = $7;`
 
 	// SelectCoinSupply fetches the newly minted atoms per block by filtering
-	// for stakebase and stake-validated coinbase transactions.
+	// for stakebase, treasurybase, and stake-validated coinbase transactions.
 	SelectCoinSupply = `SELECT vins.block_time, sum(vins.value_in)
 		FROM vins JOIN transactions
 		ON vins.tx_hash = transactions.tx_hash
 		WHERE vins.prev_tx_hash = '0000000000000000000000000000000000000000000000000000000000000000'
 		AND transactions.block_height > $1
-		AND NOT (vins.is_valid = false AND vins.tx_tree = 0)
-		AND vins.is_mainchain
+		AND vins.is_mainchain AND (vins.is_valid OR vins.tx_tree != 0)
+		AND vins.tx_type = ANY(ARRAY[0,2,6])   --- coinbase(regular),ssgen,treasurybase, but NOT tspend, same as =ANY('{0,2,6}') or IN(0,2,6)
 		GROUP BY vins.block_time, transactions.block_height
 		ORDER BY transactions.block_height;`