Fix project_limit being ignored on signup

app/controllers/registrations_controller.rb

@@ -12,9 +12,17 @@ class RegistrationsController < Devise::RegistrationsController
     end
   end
+  protected
+
+  def build_resource(hash=nil)
+    super
+    self.resource.projects_limit = Gitlab.config.gitlab.default_projects_limit
+    self.resource
+  end
+
   private
   def signup_enabled?
     redirect_to new_user_session_path unless Gitlab.config.gitlab.signup_enabled
   end
-end
+end
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