[gnome-commander] Removes gcc warning about uid_t which can not be less than zero

[Uwe Scholz <uwescholz src gnome org>]

commit ce98b7d9d2a707083acedcad4268b64c58e8240f
Author: Uwe Scholz <uwescholz src gnome org>
Date:   Wed Mar 22 21:34:19 2017 +0100

    Removes gcc warning about uid_t which can not be less than zero

 src/dialogs/gnome-cmd-chown-dialog.cc |   12 ++++++++----
 1 files changed, 8 insertions(+), 4 deletions(-)
---
diff --git a/src/dialogs/gnome-cmd-chown-dialog.cc b/src/dialogs/gnome-cmd-chown-dialog.cc
index 632f4db..0f27bf1 100644
--- a/src/dialogs/gnome-cmd-chown-dialog.cc
+++ b/src/dialogs/gnome-cmd-chown-dialog.cc
@@ -87,15 +87,19 @@ static void on_ok (GtkButton *button, GnomeCmdChownDialog *dialog)
 {
     uid_t uid = -1;
     gid_t gid = -1;
+    gint gid_temp;
 
     if (gcmd_owner.is_root())
     {
-        uid = gnome_cmd_chown_component_get_owner (GNOME_CMD_CHOWN_COMPONENT 
(dialog->priv->chown_component));
-        g_return_if_fail (uid >= 0);
+        gint uid_temp;
+        uid_temp = gnome_cmd_chown_component_get_owner (GNOME_CMD_CHOWN_COMPONENT 
(dialog->priv->chown_component));
+        g_return_if_fail (uid_temp >= 0);
+        uid = uid_temp;
     }
 
-    gid = gnome_cmd_chown_component_get_group (GNOME_CMD_CHOWN_COMPONENT (dialog->priv->chown_component));
-    g_return_if_fail (gid >= 0);
+    gid_temp = gnome_cmd_chown_component_get_group (GNOME_CMD_CHOWN_COMPONENT 
(dialog->priv->chown_component));
+    g_return_if_fail (gid_temp >= 0);
+    gid = gid_temp;
 
     gboolean recurse = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (dialog->priv->recurse_check));