https://github.com/JohnLangford/vowpal_wabbit/issues/1067: improve invalid label prediction warning in cost_sensitive.cc
https://github.com/JohnLangford/vowpal_wabbit/issues/1067:
improve invalid label prediction warning in cost_sensitive.cc

lhoang29/vowpal_wabbit,michaelbrundage/vowpal_wabbit,michaelbrundage/vowpal_wabbit,deaktator/vowpal_wabbit,jon-morra-zefr/vowpal_wabbit,lhoang29/vowpal_wabbit,hal3/vowpal_wabbit,hal3/vowpal_wabbit,lhoang29/vowpal_wabbit,michaelbrundage/vowpal_wabbit,pombredanne/vowpal_wabbit,pombredanne/vowpal_wabbit,danmelamed/vowpal_wabbit,hal3/vowpal_wabbit,deaktator/vowpal_wabbit,lhoang29/vowpal_wabbit,jon-morra-zefr/vowpal_wabbit,lhoang29/vowpal_wabbit,hal3/vowpal_wabbit,jon-morra-zefr/vowpal_wabbit,pombredanne/vowpal_wabbit,lmatthieu/myvw,deaktator/vowpal_wabbit,jon-morra-zefr/vowpal_wabbit,deaktator/vowpal_wabbit,hal3/vowpal_wabbit,michaelbrundage/vowpal_wabbit,danmelamed/vowpal_wabbit,michaelbrundage/vowpal_wabbit,lhoang29/vowpal_wabbit,deaktator/vowpal_wabbit,jon-morra-zefr/vowpal_wabbit,hal3/vowpal_wabbit,michaelbrundage/vowpal_wabbit,deaktator/vowpal_wabbit,danmelamed/vowpal_wabbit,jon-morra-zefr/vowpal_wabbit,pombredanne/vowpal_wabbit,lmatthieu/myvw,lmatthieu/myvw,hal3/vowpal_wabbit,pombredanne/vowpal_wabbit,jon-morra-zefr/vowpal_wabbit,michaelbrundage/vowpal_wabbit,deaktator/vowpal_wabbit,hal3/vowpal_wabbit,lhoang29/vowpal_wabbit,lhoang29/vowpal_wabbit,pombredanne/vowpal_wabbit,lmatthieu/myvw,lhoang29/vowpal_wabbit,lmatthieu/myvw,pombredanne/vowpal_wabbit,hal3/vowpal_wabbit,deaktator/vowpal_wabbit,lmatthieu/myvw,jon-morra-zefr/vowpal_wabbit,danmelamed/vowpal_wabbit,lmatthieu/myvw,danmelamed/vowpal_wabbit,hal3/vowpal_wabbit,jon-morra-zefr/vowpal_wabbit,jon-morra-zefr/vowpal_wabbit,danmelamed/vowpal_wabbit,danmelamed/vowpal_wabbit,jon-morra-zefr/vowpal_wabbit,deaktator/vowpal_wabbit,deaktator/vowpal_wabbit,danmelamed/vowpal_wabbit,michaelbrundage/vowpal_wabbit,lhoang29/vowpal_wabbit,michaelbrundage/vowpal_wabbit,danmelamed/vowpal_wabbit,pombredanne/vowpal_wabbit,lmatthieu/myvw,deaktator/vowpal_wabbit,lmatthieu/myvw,pombredanne/vowpal_wabbit,michaelbrundage/vowpal_wabbit,danmelamed/vowpal_wabbit,pombredanne/vowpal_wabbit,hal3/vowpal_wabbit