inspector: Don't set a NULL fontdesc

The font dialog button does not like that.

Fixes: #5988

diff --git a/gtk/inspector/prop-editor.c b/gtk/inspector/prop-editor.c
index e33b88432f392047f58d1efc50f6d5b94fe0bc8e..15de3d4d23a270e533678b65270df3666f81e6d3 100644 (file)
--- a/gtk/inspector/prop-editor.c
+++ b/gtk/inspector/prop-editor.c
@@ -797,9 +797,12 @@ font_changed (GObject *object, GParamSpec *pspec, gpointer data)
 
   font_desc = g_value_get_boxed (&val);
 
-  block_controller (G_OBJECT (fb));
-  gtk_font_dialog_button_set_font_desc (fb, font_desc);
-  unblock_controller (G_OBJECT (fb));
+  if (font_desc != NULL)
+    {
+      block_controller (G_OBJECT (fb));
+      gtk_font_dialog_button_set_font_desc (fb, font_desc);
+      unblock_controller (G_OBJECT (fb));
+    }
 
   g_value_unset (&val);
 }