Use xqp_double::nan() directly in translator instead of cast expression  hacks.
Use xqp_double::nan() directly in translator instead of cast expression 
hacks.

28msec/zorba,bgarrels/zorba,28msec/zorba,cezarfx/zorba,bgarrels/zorba,cezarfx/zorba,cezarfx/zorba,28msec/zorba,cezarfx/zorba,28msec/zorba,28msec/zorba,28msec/zorba,28msec/zorba,bgarrels/zorba,cezarfx/zorba,cezarfx/zorba,bgarrels/zorba,cezarfx/zorba,bgarrels/zorba,bgarrels/zorba,28msec/zorba,28msec/zorba,cezarfx/zorba,cezarfx/zorba,bgarrels/zorba,bgarrels/zorba,cezarfx/zorba