A nil value for scales_to on existing embedded cartridges is getting reported back from the rest api.  The stack trace reported from the UI that was caught in our error reporting (see below).  This is occurring on prod when existing scalable apps are accessed.

Example error:
When hitting JBoss AS7 scalable app with MySQL, https://openshift.redhat.com/app/console/application/51dafc5e4382eceb250001f6-bugtest

Generates ref ID: 295773a0c685ced07c8782538bdf37a9 and the stack trace below is reported.

ArgumentError: comparison of Fixnum with nil failed 
…penshift-origin-console-1.15.7/app/models/
cartridge.rb: 112:in `each'
…penshift-origin-console-1.15.7/app/models/
cartridge.rb: 112:in `min'
…penshift-origin-console-1.15.7/app/models/
cartridge.rb: 112:in `effective_scales_to'
…penshift-origin-console-1.15.7/app/models/
cartridge.rb: 104:in `will_scale_to'
…nshift-origin-console-1.15.7/app/models/
application.rb: 217:in `block (2 levels) in gear_ranges'
…nshift-origin-console-1.15.7/app/models/
application.rb: 215:in `each'
…nshift-origin-console-1.15.7/app/models/
application.rb: 215:in `block in gear_ranges'
…nshift-origin-console-1.15.7/app/models/
application.rb: 212:in `each'
…nshift-origin-console-1.15.7/app/models/
application.rb: 212:in `inject'
…nshift-origin-console-1.15.7/app/models/
application.rb: 212:in `gear_ranges'
…s/gems/haml-4.0.3/lib/haml/helpers/
action_view_mods.rb:  45:in `block in capture_with_haml'
…oot/usr/share/gems/gems/haml-4.0.3/lib/haml/
helpers.rb: 368:in `call'
…oot/usr/share/gems/gems/haml-4.0.3/lib/haml/
helpers.rb: 368:in `block in capture_haml'
…oot/usr/share/gems/gems/haml-4.0.3/lib/haml/
helpers.rb: 617:in `with_haml_buffer'
…oot/usr/share/gems/gems/haml-4.0.3/lib/haml/
helpers.rb: 364:in `capture_haml'
…hare/gems/gems/haml-4.0.3/lib/haml/helpers/
xss_mods.rb:  61:in `capture_haml_with_haml_xss'
…s/gems/haml-4.0.3/lib/haml/helpers/
action_view_mods.rb:  45:in `capture_with_haml'
…sr/share/gems/gems/journey-1.0.4/lib/journey/
router.rb:  68:in `block in call'
…sr/share/gems/gems/journey-1.0.4/lib/journey/
router.rb:  56:in `each'
…sr/share/gems/gems/journey-1.0.4/lib/journey/
router.rb:  56:in `call'
…e/gems/gems/rack-recaptcha-0.6.5/lib/rack/
recaptcha.rb:  50:in `_call'
…e/gems/gems/rack-recaptcha-0.6.5/lib/rack/
recaptcha.rb:  37:in `call'
…3/root/usr/share/gems/gems/rack-1.4.1/lib/rack/
etag.rb:  23:in `call'
…/share/gems/gems/rack-1.4.1/lib/rack/
conditionalget.rb:  25:in `call'
…e/gems/gems/rack-1.4.1/lib/rack/session/abstract/
id.rb: 205:in `context'
…e/gems/gems/rack-1.4.1/lib/rack/session/abstract/
id.rb: 200:in `call'
…ot/usr/share/gems/gems/rack-1.4.1/lib/rack/
sendfile.rb: 102:in `call'