File vala-0.56.patch of Package shotwell

--- a/src/Resources.vala
+++ b/src/Resources.vala
@@ -5,9 +5,9 @@
  */
 
 // defined by ./configure or Makefile and included by gcc -D
-extern const string _PREFIX;
-extern const string _VERSION;
-extern const string GETTEXT_PACKAGE;
+public extern const string _PREFIX;
+public extern const string _VERSION;
+public extern const string GETTEXT_PACKAGE;
 extern const string _LIB;
 extern const string _LIBEXECDIR;
 extern const string? _GIT_VERSION;