chore: update IAVL (backport #14830) (#14834)

Co-authored-by: Marko <[email protected]>

go.mod

@@ -11,7 +11,7 @@ require (
 	github.com/confio/ics23/go v0.9.0
 	github.com/cosmos/btcutil v1.0.4
 	github.com/cosmos/go-bip39 v1.0.0
-	github.com/cosmos/iavl v0.19.4
+	github.com/cosmos/iavl v0.19.5-rc.1
 	github.com/cosmos/ledger-cosmos-go v0.12.2
 	github.com/gogo/gateway v1.1.0
 	github.com/gogo/protobuf v1.3.3

go.sum

@@ -162,8 +162,8 @@ github.com/cosmos/btcutil v1.0.4/go.mod h1:Ffqc8Hn6TJUdDgHBwIZLtrLQC1KdJ9jGJl/Tv
 github.com/cosmos/go-bip39 v0.0.0-20180819234021-555e2067c45d/go.mod h1:tSxLoYXyBmiFeKpvmq4dzayMdCjCnu8uqmCysIGBT2Y=
 github.com/cosmos/go-bip39 v1.0.0 h1:pcomnQdrdH22njcAatO0yWojsUnCO3y2tNoV1cb6hHY=
 github.com/cosmos/go-bip39 v1.0.0/go.mod h1:RNJv0H/pOIVgxw6KS7QeX2a0Uo0aKUlfhZ4xuwvCdJw=
-github.com/cosmos/iavl v0.19.4 h1:t82sN+Y0WeqxDLJRSpNd8YFX5URIrT+p8n6oJbJ2Dok=
-github.com/cosmos/iavl v0.19.4/go.mod h1:X9PKD3J0iFxdmgNLa7b2LYWdsGd90ToV5cAONApkEPw=
+github.com/cosmos/iavl v0.19.5-rc.1 h1:4PjF2PdScyPbN1WbXpiQU21YtyonnrMU31xN74g8Rkg=
+github.com/cosmos/iavl v0.19.5-rc.1/go.mod h1:X9PKD3J0iFxdmgNLa7b2LYWdsGd90ToV5cAONApkEPw=
 github.com/cosmos/keyring v1.2.0 h1:8C1lBP9xhImmIabyXW4c3vFjjLiBdGCmfLUfeZlV1Yo=
 github.com/cosmos/keyring v1.2.0/go.mod h1:fc+wB5KTk9wQ9sDx0kFXB3A0MaeGHM9AwRStKOQ5vOA=
 github.com/cosmos/ledger-cosmos-go v0.12.2 h1:/XYaBlE2BJxtvpkHiBm97gFGSGmYGKunKyF3nNqAXZA=

store/iavl/store.go

@@ -267,7 +267,7 @@ func (st *Store) Export(version int64) (*iavl.Exporter, error) {
 	if !ok || tree == nil {
 		return nil, fmt.Errorf("iavl export failed: unable to fetch tree for version %v", version)
 	}
-	return tree.Export(), nil
+	return tree.Export()
 }
 
 // Import imports an IAVL tree at the given version, returning an iavl.Importer for importing.