[gthumb] added reference to missing header file

[Paolo Bacchilega <paobac src gnome org>]

commit 1e0d72463d7a0ec234aaa249e8defed65c0f578e
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Sat Nov 9 15:25:35 2013 +0100

    added reference to missing header file

 extensions/photo_importer/Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/extensions/photo_importer/Makefile.am b/extensions/photo_importer/Makefile.am
index aefde05..13e4c72 100644
--- a/extensions/photo_importer/Makefile.am
+++ b/extensions/photo_importer/Makefile.am
@@ -11,6 +11,7 @@ libphoto_importer_la_SOURCES =                \
        dlg-photo-importer.c            \
        dlg-photo-importer.h            \
        main.c                          \
+       photo-importer.h                \
        preferences.h                   \
        resources.c                     \
        resources.h