[gnome-applets] cpufreq: fix -Wswitch-default warnings

[Alberts Muktupāvels <muktupavels src gnome org>]

commit c6576d06b4b9897d7fb54872249b0d4fd392cd62
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Tue Mar 10 15:15:03 2020 +0200

    cpufreq: fix -Wswitch-default warnings

 cpufreq/src/cpufreq-applet.c | 9 +++++++++
 cpufreq/src/cpufreq-prefs.c  | 3 +++
 2 files changed, 12 insertions(+)
---
diff --git a/cpufreq/src/cpufreq-applet.c b/cpufreq/src/cpufreq-applet.c
index c621cdb56..f7c8a3cd4 100644
--- a/cpufreq/src/cpufreq-applet.c
+++ b/cpufreq/src/cpufreq-applet.c
@@ -199,6 +199,9 @@ cpufreq_applet_init (CPUFreqApplet *applet)
        case PANEL_APPLET_ORIENT_DOWN:
                gtk_widget_set_halign (applet->box, GTK_ALIGN_START);
                break;
+       default:
+               g_assert_not_reached ();
+               break;
        }
 
         applet->icon = gtk_image_new ();
@@ -315,6 +318,9 @@ cpufreq_applet_size_allocate (GtkWidget *widget, GtkAllocation *allocation)
         case PANEL_APPLET_ORIENT_DOWN:
                 size = allocation->height;
                 break;
+        default:
+                g_assert_not_reached ();
+                break;
         }
 
         if (size != applet->size) {
@@ -724,6 +730,9 @@ cpufreq_applet_update_visibility (CPUFreqApplet *applet)
                         show_freq = TRUE;
                         show_unit = TRUE;
                         break;
+                default:
+                        g_assert_not_reached ();
+                        break;
                 }
         } else {
                 show_icon = TRUE;
diff --git a/cpufreq/src/cpufreq-prefs.c b/cpufreq/src/cpufreq-prefs.c
index 895664b2a..4dfc80d1f 100644
--- a/cpufreq/src/cpufreq-prefs.c
+++ b/cpufreq/src/cpufreq-prefs.c
@@ -434,6 +434,9 @@ cpufreq_prefs_dialog_update (CPUFreqPrefs *prefs)
                                              TRUE);
 
                break;
+       default:
+               g_assert_not_reached ();
+               break;
        }
 }