Add caller info for the eval'd code.

Not actually necessary to fix the warning, because the eval'd frame is
skipped by the logger, but nicer in case we need to look at full
backtraces.

src/ruby/yast/ops.rb

@@ -45,7 +45,7 @@ module Ops
     ]
 
     Ops::SHORTCUT_TYPES.each do |type|
-      eval <<END
+      eval <<END, binding, __FILE__, __LINE__ + 1
         def self.get_#{type}(object, indexes, default=nil, &block)
           Yast::Convert.to_#{type} get(object, indexes, default, 1, &block)
         end