Simplify standard condition reporting

[Michał "phoe" Herda]

SICL/Code/Conditions/conditions.lisp

Lines 23 to 27 in e19613c

 (defmethod report-condition ((condition serious-condition) 
                              stream 
                              (language (eql 'english))) 
   (format stream 
           "A condition of type SERIOUS-CONDITION was signaled.")) 

Many conditions defined there have almost the same reports that could altogether be simplified to (format stream "A condition of type ~S was signaled." (type-of condition)). Perhaps it would be good to define this report as a method on condition and let all other conditions inherit this default reporter?