genesys: Fix bcdDevice filtering

backend/genesys/genesys.cpp

@@ -4802,8 +4802,9 @@ const UsbDeviceEntry& get_matching_usb_dev(std::uint16_t vendor_id, std::uint16_
         }
     }
 
-    throw SaneException("vendor 0x%x product 0x%x is not supported by this backend",
-                        vendor_id, product_id);
+    throw SaneException("vendor 0x%x product 0x%x (bcdDevice 0x%x) "
+                        "is not supported by this backend",
+                        vendor_id, product_id, bcd_device);
 }
 
 static Genesys_Device* attach_usb_device(const char* devname,

backend/genesys/low.h

@@ -196,8 +196,11 @@ public:
             return false;
         if (product_ != product_id)
             return false;
-        if (bcd_device_ != BCD_DEVICE_NOT_SET && bcd_device_ != bcd_device)
+        if (bcd_device_ != BCD_DEVICE_NOT_SET && bcd_device != BCD_DEVICE_NOT_SET &&
+            bcd_device_ != bcd_device)
+        {
             return false;
+        }
         return true;
     }