[gnome-commander/ConfigurableFileListColumns] Create method for getting the directory size string of a file in the file list

[Uwe Scholz <uwescholz src gnome org>]

commit a6431f5370bf069a0d716c41a398bb5a2f8c88ae
Author: Uwe Scholz <u scholz83 gmx de>
Date:   Sat May 4 16:24:22 2019 +0200

    Create method for getting the directory size string of a file in the file list

 src/gnome-cmd-file-list.cc | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
---
diff --git a/src/gnome-cmd-file-list.cc b/src/gnome-cmd-file-list.cc
index a10681e4..8eb0eee8 100644
--- a/src/gnome-cmd-file-list.cc
+++ b/src/gnome-cmd-file-list.cc
@@ -362,6 +362,11 @@ static gchar* GetGnomeCmdFileListDirString(GnomeCmdFileList *fl, GnomeCmdFile *f
     return returnValue;
 }
 
+static gchar* GetGnomeCmdFileListSize(GnomeCmdFile *f, gboolean tree_size)
+{
+    return tree_size ? (gchar *) f->get_tree_size_as_str() : (gchar *) f->get_size();
+}
+
 
 FileFormatData::FileFormatData(GnomeCmdFileList *fl, GnomeCmdFile *f, gboolean tree_size)
 {
@@ -373,7 +378,7 @@ FileFormatData::FileFormatData(GnomeCmdFileList *fl, GnomeCmdFile *f, gboolean t
 
     DEBUG ('l', "FileFormatData text[GnomeCmdFileList::COLUMN_DIR]=[%s]\n", 
text[GnomeCmdFileList::COLUMN_DIR]);
 
-    text[GnomeCmdFileList::COLUMN_SIZE]  = tree_size ? (gchar *) f->get_tree_size_as_str() : (gchar *) 
f->get_size();
+    text[GnomeCmdFileList::COLUMN_SIZE]  = GetGnomeCmdFileListSize(f, tree_size);
 
     if (f->info->type != GNOME_VFS_FILE_TYPE_DIRECTORY || !f->is_dotdot)
     {