[gnome-commander/ConvertWarningsToErrors] src/gnome-cmd-file-list.cc: fix for -Wsign-compare

[Uwe Scholz <uwescholz src gnome org>]

commit b88feb07533e9990d60edc2d8766e9a210e7fa01
Author: Mamoru TASAKA <mtasaka fedoraproject org>
Date:   Sun Apr 23 13:10:58 2017 +0900

    src/gnome-cmd-file-list.cc: fix for -Wsign-compare
    
    src/gnome-cmd-file-list.cc:1996:24: error: comparison between signed and unsigned integer expressions 
[-Werror=sign-compare]

 src/gnome-cmd-file-list.cc |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/gnome-cmd-file-list.cc b/src/gnome-cmd-file-list.cc
index ed87e38..fde0203 100644
--- a/src/gnome-cmd-file-list.cc
+++ b/src/gnome-cmd-file-list.cc
@@ -1993,7 +1993,7 @@ void GnomeCmdFileList::toggle_and_step()
 
     if (f)
         toggle_file(f);
-    if (priv->cur_file < size()-1)
+    if (priv->cur_file < (gint)size()-1)
         focus_file_at_row (this, priv->cur_file+1);
 }