[simple-scan] Set Scan Area to Maximum in case, automatic mode were enabled.

[Bartosz <bkosiorek src gnome org>]

commit 7630ddc7f9632ce692cf6ba0321d7d39eddbae38
Author: Bartosz Kosiorek <gang65 poczta onet pl>
Date:   Thu Apr 2 16:31:03 2020 +0200

    Set Scan Area to Maximum in case, automatic mode were enabled.
    
    Fix: #90

 src/scanner.vala | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
---
diff --git a/src/scanner.vala b/src/scanner.vala
index 5470eab0..becb9fa0 100644
--- a/src/scanner.vala
+++ b/src/scanner.vala
@@ -1134,7 +1134,12 @@ public class Scanner : Object
                 else
                     set_option_to_max (handle, option, index);
             }
-
+            if (job.page_width == 0) /* #90 Fix automatic mode for Epson scanners */
+            {
+                option = get_option_by_name (handle, "scan-area", out index);
+                if (option != null)
+                    set_string_option (handle, option, index, "Maximum", null);
+            }
             /* Set page size */
             option = get_option_by_name (handle, Sane.NAME_PAGE_WIDTH, out index);
             if (option != null && job.page_width > 0.0)