[gnome-commander/ConfigurableFileListColumns] Fix problem with file list header in the icon column

[Uwe Scholz <uwescholz src gnome org>]

commit 5637175566edfaf4e914064a18446dd3f1d59176
Author: Uwe Scholz <u scholz83 gmx de>
Date:   Sun Jun 2 17:44:24 2019 +0200

    Fix problem with file list header in the icon column

 src/gnome-cmd-file-list.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/gnome-cmd-file-list.cc b/src/gnome-cmd-file-list.cc
index ebc1b027..99596b98 100644
--- a/src/gnome-cmd-file-list.cc
+++ b/src/gnome-cmd-file-list.cc
@@ -121,7 +121,7 @@ static gint sort_by_group (GnomeCmdFile *f1, GnomeCmdFile *f2, GnomeCmdFileList
 
 
 static GnomeCmdFileListColumn file_list_column[GnomeCmdFileList::NUM_COLUMNS] =
-{{GnomeCmdFileList::COLUMN_ICON,"",GTK_JUSTIFY_CENTER,GTK_SORT_ASCENDING, nullptr},
+{{GnomeCmdFileList::COLUMN_ICON, (const char*) '\0', GTK_JUSTIFY_CENTER,GTK_SORT_ASCENDING, nullptr},
  {GnomeCmdFileList::COLUMN_NAME, N_("name"), GTK_JUSTIFY_LEFT, GTK_SORT_ASCENDING, (GCompareDataFunc) 
sort_by_name},
  {GnomeCmdFileList::COLUMN_EXT, N_("ext"), GTK_JUSTIFY_LEFT, GTK_SORT_ASCENDING, (GCompareDataFunc) 
sort_by_ext},
  {GnomeCmdFileList::COLUMN_DIR, N_("dir"), GTK_JUSTIFY_LEFT, GTK_SORT_ASCENDING, (GCompareDataFunc) 
sort_by_dir},