Minor fix for last migration

Calling op.get_bind outside a callback broke "flask db history".

uffd/migrations/versions/af07cea65391_unified_password_hashing_for_user_and_signup.py

-"""Unified password hashing for User and Signup
+"""unified password hashing for User and Signup
 
 Revision ID: af07cea65391
 Revises: 042879d5e3ac
@@ -13,6 +13,7 @@ down_revision = '042879d5e3ac'
 branch_labels = None
 depends_on = None
 
+def upgrade():
 	meta = sa.MetaData(bind=op.get_bind())
 	signup = sa.Table('signup', meta,
 		sa.Column('id', sa.Integer(), autoincrement=True, nullable=False),
@@ -29,7 +30,6 @@ signup = sa.Table('signup', meta,
 		sa.UniqueConstraint('user_id', name=op.f('uq_signup_user_id'))
 	)
 
-def upgrade():
 	user = sa.Table('user', meta,
 		sa.Column('id', sa.Integer(), autoincrement=True, nullable=False),
 		sa.Column('unix_uid', sa.Integer(), nullable=False),
@@ -48,6 +48,22 @@ def upgrade():
 	op.execute(signup.update().values(pwhash=('{crypt}' + signup.c.pwhash)))
 
 def downgrade():
+	meta = sa.MetaData(bind=op.get_bind())
+	signup = sa.Table('signup', meta,
+		sa.Column('id', sa.Integer(), autoincrement=True, nullable=False),
+		sa.Column('token', sa.String(length=128), nullable=False),
+		sa.Column('created', sa.DateTime(), nullable=False),
+		sa.Column('loginname', sa.Text(), nullable=True),
+		sa.Column('displayname', sa.Text(), nullable=True),
+		sa.Column('mail', sa.Text(), nullable=True),
+		sa.Column('pwhash', sa.Text(), nullable=True),
+		sa.Column('user_id', sa.Integer(), nullable=True),
+		sa.Column('type', sa.String(length=50), nullable=True),
+		sa.ForeignKeyConstraint(['user_id'], ['user.id'], name=op.f('fk_signup_user_id_user'), onupdate='CASCADE', ondelete='CASCADE'),
+		sa.PrimaryKeyConstraint('id', name=op.f('pk_signup')),
+		sa.UniqueConstraint('user_id', name=op.f('uq_signup_user_id'))
+	)
+
 	user = sa.Table('user', meta,
 		sa.Column('id', sa.Integer(), autoincrement=True, nullable=False),
 		sa.Column('unix_uid', sa.Integer(), nullable=False),