Fix ineffectual assignments in migrations

migrations/migrations.go

@@ -87,6 +87,9 @@ func Migrate(db *datastore) error {
 	var err error
 	if db.tableExists("appmigrations") {
 		err = db.QueryRow("SELECT MAX(version) FROM appmigrations").Scan(&version)
+		if err != nil {
+			return err
+		}
 	} else {
 		log.Info("Initializing appmigrations table...")
 		version = 0

migrations/v1.go

@@ -12,6 +12,9 @@ package migrations
 
 func supportUserInvites(db *datastore) error {
 	t, err := db.Begin()
+	if err != nil {
+		return err
+	}
 	_, err = t.Exec(`CREATE TABLE userinvites (
 		  id ` + db.typeChar(6) + ` NOT NULL ,
 		  owner_id ` + db.typeInt() + ` NOT NULL ,

migrations/v2.go

@@ -12,6 +12,9 @@ package migrations
 
 func supportInstancePages(db *datastore) error {
 	t, err := db.Begin()
+	if err != nil {
+		return err
+	}
 
 	_, err = t.Exec(`ALTER TABLE appcontent ADD COLUMN title ` + db.typeVarChar(255) + db.collateMultiByte() + ` NULL`)
 	if err != nil {

migrations/v3.go

@@ -12,6 +12,9 @@ package migrations
 
 func supportUserStatus(db *datastore) error {
 	t, err := db.Begin()
+	if err != nil {
+		return err
+	}
 
 	_, err = t.Exec(`ALTER TABLE users ADD COLUMN status ` + db.typeInt() + ` DEFAULT '0' NOT NULL`)
 	if err != nil {

migrations/v6.go

@@ -12,6 +12,9 @@ package migrations
 
 func supportActivityPubMentions(db *datastore) error {
 	t, err := db.Begin()
+	if err != nil {
+		return err
+	}
 
 	_, err = t.Exec(`ALTER TABLE remoteusers ADD COLUMN handle ` + db.typeVarChar(255) + ` NULL`)
 	if err != nil {