check for empty email

app/controllers/discourse_donations/charges_controller.rb

@@ -7,10 +7,8 @@ module DiscourseDonations
     skip_before_filter :verify_authenticity_token, only: [:create]
 
     def create
-      if email.nil?
-        response = {
-
-        }
+      if email.nil? || email.empty?
+        response = {}
       else
         Stripe.api_key = SiteSetting.discourse_donations_secret_key
         currency = SiteSetting.discourse_donations_currency

plugin.rb

@@ -1,6 +1,6 @@
 # name: discourse-donations
 # about: Integrating Discourse with Stripe for donations
-# version: 1.7.2
+# version: 1.7.3
 # url: https://github.com/choiceaustralia/discourse-donations
 # authors: Rimian Perkins
 

spec/controllers/discourse_donations/charges_controller_spec.rb

@@ -15,7 +15,7 @@ module DiscourseDonations
     end
 
     it 'responds ok when the email is empty' do
-      post :create, { }
+      post :create, { email: '' }
       expect(response).to have_http_status(200)
     end