[simple-scan] Skip virtual devices when detecting scanners

[Bartosz <bkosiorek src gnome org>]

commit b907b9fbf5faaabf44d51cb3ea99d4ff25039f4c
Author: Yassine Oudjana <y oudjana protonmail com>
Date:   Thu Mar 3 10:32:18 2022 +0400

    Skip virtual devices when detecting scanners
    
    Virtual devices are generally not scanners. Skip them to avoid
    picking up webcams and other media devices as scanners.

 src/scanner.vala | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/src/scanner.vala b/src/scanner.vala
index 809ba6c0..495ee9d0 100644
--- a/src/scanner.vala
+++ b/src/scanner.vala
@@ -367,6 +367,10 @@ public class Scanner : Object
         var devices = new List<ScanDevice> ();
         for (var i = 0; device_list[i] != null; i++)
         {
+            /* Virtual devices tend to not be scanners. Skip them. */
+            if (device_list[i].type == "virtual device")
+                continue;
+
             debug ("Device: name=\"%s\" vendor=\"%s\" model=\"%s\" type=\"%s\"",
                    device_list[i].name, device_list[i].vendor, device_list[i].model, device_list[i].type);