Fix path to models in Util.file_by_name

lib/brakeman/util.rb

@@ -305,7 +305,7 @@ module Brakeman::Util
     unless type
       if string_name =~ /Controller$/
         type = :controller
-      elsif camelize(string_name) == string_name
+      elsif camelize(string_name) == string_name # This is not always true
         type = :model
       else
         type = :template
@@ -325,7 +325,7 @@ module Brakeman::Util
       if tracker.models[name] and tracker.models[name][:file]
         path = tracker.models[name][:file]
       else
-        path += "/app/controllers/#{underscore(string_name)}.rb"
+        path += "/app/models/#{underscore(string_name)}.rb"
       end
     when :template
       if tracker.templates[name] and tracker.templates[name][:file]