honor GENESYS_NO_CALIBRATION flag at scan time

- don't enable shading correction if device has the GENESYS_NO_CALIBRATION
  flag when setting registers for final scan
final scan

ChangeLog

@@ -1,3 +1,7 @@
+2009-10-01  Stéphane Voltz <stef.dev at free.fr>
+	* backend/genesys_gl646.c: honor GENESYS_NO_CALIBRATION device
+	flag when setting registers for final scan
+
 2009-10-01 Jonathan Bravo Lopez <jkdsoft at gmail dot com>
 	* backend/hp3900_sane.c:
 	fix bug 311991: "Bad option sizes let frontend (e.g. xsane) crash"

backend/genesys_gl646.c

@@ -800,6 +800,12 @@ gl646_setup_registers (Genesys_Device * dev,
   else
     regs[reg_0x01].value &= ~REG01_CISSET;
 
+  /* if device has no calibration, don't enable shading correction */
+  if(dev->model->flags & GENESYS_FLAG_NO_CALIBRATION)
+   {
+      regs[reg_0x01].value &= ~REG01_DVDSET;
+   }
+
   if (motor->fastmod)
     regs[reg_0x01].value |= REG01_FASTMOD;
   else