[gnome-control-center] printers: Fix visibility guard for the printer "Model" label

[Felipe Borges <felipeborges src gnome org>]

commit 756eb883df11a089f948a5971fa11f6ae98b868d
Author: Felipe Borges <felipeborges gnome org>
Date:   Tue Jul 25 14:49:41 2017 +0200

    printers: Fix visibility guard for the printer "Model" label
    
    This is a typo related to the fix at commit 7d25444.

 panels/printers/pp-printer-entry.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/panels/printers/pp-printer-entry.c b/panels/printers/pp-printer-entry.c
index 6274fcf..ba704b9 100644
--- a/panels/printers/pp-printer-entry.c
+++ b/panels/printers/pp-printer-entry.c
@@ -914,7 +914,7 @@ pp_printer_entry_new (cups_dest_t  printer,
 
   self->printer_make_and_model = sanitize_printer_model (printer_make_and_model);
 
-  if (self->printer_make_and_model == NULL || self->printer_make_and_model[0] != '\0')
+  if (self->printer_make_and_model == NULL || self->printer_make_and_model[0] == '\0')
     {
       gtk_widget_hide (GTK_WIDGET (self->printer_model_label));
       gtk_widget_hide (GTK_WIDGET (self->printer_model));