[gnome-commander] Add a directory separator when trying to copy a file and it is missing

[Uwe Scholz <uwescholz src gnome org>]

commit 6f903756d61d0088c53985ea5d6e25425fbc24bc
Author: Uwe Scholz <u scholz83 gmx de>
Date:   Thu Jan 6 23:14:53 2022 +0100

    Add a directory separator when trying to copy a file and it is missing

 src/dialogs/gnome-cmd-prepare-xfer-dialog.cc | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)
---
diff --git a/src/dialogs/gnome-cmd-prepare-xfer-dialog.cc b/src/dialogs/gnome-cmd-prepare-xfer-dialog.cc
index adba7122..7d67cb3b 100644
--- a/src/dialogs/gnome-cmd-prepare-xfer-dialog.cc
+++ b/src/dialogs/gnome-cmd-prepare-xfer-dialog.cc
@@ -89,7 +89,17 @@ static void on_ok (GtkButton *button, GnomeCmdPrepareXferDialog *dialog)
         if (!gnome_cmd_dir_is_local (dialog->default_dest_dir))
         {
             const gchar *t = gnome_cmd_dir_get_path (dialog->default_dest_dir)->get_path();
-            dest_path = g_build_filename (t, user_path, nullptr);
+            auto destPathTmp = g_build_filename (t, user_path, nullptr);
+            if (*destPathTmp != '/')
+            {
+                dest_path = g_strdup_printf("%s%s", G_DIR_SEPARATOR_S, destPathTmp);
+                g_free(destPathTmp);
+            }
+            else
+            {
+                dest_path = destPathTmp;
+            }
+
         }
         else
         {