Added constructor for unused ft_select_expr class to keep older gcc  happy
Added constructor for unused ft_select_expr class to keep older gcc 
happy

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