Fix for older Perfection 1650 scanners - their firmware only reports half

of the vertical scanning area and they need to swap two color channels.

backend/epson.desc

@@ -10,7 +10,7 @@
 ;
 
 :backend "epson"                  ; name of backend
-:version "0.2.08"                 ; version of backend
+:version "0.2.11"                 ; version of backend
 :status :stable                   ; :alpha, :beta, :stable, :new
 :manpage "sane-epson"             ; name of manpage (if it exists)
 :url "http://www.freecolormanagement.com/sane"        ; backend's web page
@@ -88,6 +88,9 @@
 :model "Perfection 1640"
 :interface "SCSI USB"
 
+:model "Perfection 1650"
+:interface "SCSI USB"
+
 :model "Expression 636"
 :comment "US version of GT-9500"
 :interface "SCSI"

backend/epson.h

@@ -228,6 +228,9 @@ struct Epson_Device {
 	SANE_Int  optical_res;		/* optical resolution */
 	SANE_Int  max_line_distance;
 
+  SANE_Bool need_double_vertical;
+  SANE_Bool need_color_reorder;
+
 	EpsonCmd cmd;
 };