server: fix update distributor

server.rb

@@ -321,7 +321,7 @@ post '/part' do
     part[field].each do |distributor,sku|
       next unless sku and !sku.empty?
       statement = @db.prepare("SELECT id FROM distributor WHERE LOWER(name) = ?")
-      ref = statement.execute(name.downcase).to_a[0]
+      ref = statement.execute(distributor.downcase).to_a[0]
       halt(401, "distributor unknown") unless ref
       insert = @db.prepare("INSERT INTO distribution (distributor,part,sku) VALUES (?,?,?)");
       insert.execute(ref["id"], part["id"], sku)