Add header file

src/iconmanager.cpp

@@ -1,5 +1,5 @@
 /* Solmyr - H3M manager
- * Copyright (C) 2009 Xavier Gendre
+ * Copyright (C) 2009, 2021 Xavier Gendre
  *
  * This file is part of Solmyr.
  *
@@ -20,6 +20,7 @@
 #include "config.hpp"
 #include "iconmanager.hpp"
 
+#include <glibmm/fileutils.h> // GLib::FileError
 #include <glibmm/i18n.h>
 #include <glibmm/miscutils.h> // build_filename
 

src/pixmanager.cpp

@@ -1,5 +1,5 @@
 /* Solmyr - H3M manager
- * Copyright (C) 2009 Xavier Gendre
+ * Copyright (C) 2009, 2021 Xavier Gendre
  *
  * This file is part of Solmyr.
  *
@@ -20,6 +20,7 @@
 #include "config.hpp"
 #include "pixmanager.hpp"
 
+#include <glibmm/fileutils.h> // GLib::FileError
 #include <glibmm/i18n.h>
 #include <glibmm/miscutils.h> // build_filename