Move some constants

Gtk4/gtk151_prefs_gtk4/src/MyItem.cpp

@@ -1,5 +1,9 @@
 #include "MyItem.h"
 
+// File name and path limits
+#define name_max_length 256
+#define path_max_length 4096
+
 struct _MyItem
 {
     GObject parent_instance;

Gtk4/gtk151_prefs_gtk4/src/MyItem.h

@@ -4,10 +4,6 @@
 
 G_DECLARE_FINAL_TYPE(MyItem, my_item, MY, ITEM, GObject)
 
-// File name and path limits
-const int name_max_length = 256;
-const int path_max_length = 4096;
-
 // Create a new item
 MyItem *my_item_new(const char *disp_name, const char *path,
                     gboolean internal1);