treebrowser: Force icon sizes

Force using the same icon size for all file types even if the theme in
use doesn't have the requested size to avoid varying icon sizes.

Closes geany#1416.

Author: b4n

treebrowser/src/treebrowser.c

@@ -231,15 +231,17 @@ utils_pixbuf_from_path(gchar *path)
 
 	if (icon != NULL)
 	{
+		const GtkIconLookupFlags flags = GTK_ICON_LOOKUP_USE_BUILTIN | GTK_ICON_LOOKUP_FORCE_SIZE;
+
 		gtk_icon_size_lookup(GTK_ICON_SIZE_MENU, &width, NULL);
-		info = gtk_icon_theme_lookup_by_gicon(gtk_icon_theme_get_default(), icon, width, GTK_ICON_LOOKUP_USE_BUILTIN);
+		info = gtk_icon_theme_lookup_by_gicon(gtk_icon_theme_get_default(), icon, width, flags);
 		g_object_unref(icon);
 		if (!info)
 		{
 			icon = g_themed_icon_new("text-x-generic");
 			if (icon != NULL)
 			{
-				info = gtk_icon_theme_lookup_by_gicon(gtk_icon_theme_get_default(), icon, width, GTK_ICON_LOOKUP_USE_BUILTIN);
+				info = gtk_icon_theme_lookup_by_gicon(gtk_icon_theme_get_default(), icon, width, flags);
 				g_object_unref(icon);
 			}
 		}