[gnome-photos] main: Make the WM_CLASS match the application ID

[Debarshi Ray <debarshir src gnome org>]

commit c737e7a32607d194cc2c82317a9b5860a7e332b0
Author: Debarshi Ray <debarshir gnome org>
Date:   Fri Jan 5 20:04:30 2018 +0100

    main: Make the WM_CLASS match the application ID
    
    The application ID and the window's WM_CLASS are used by GNOME Shell to
    retrieve the application icon from the desktop file. This isn't a
    problem at the moment because the application ID matches the name of
    the desktop file, and that's good enough for GNOME Shell. However,
    it's good to have the WM_CLASS match it too to help other environments
    that might have a subtly different logic to retrieve the icon.

 src/photos-main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/photos-main.c b/src/photos-main.c
index 30e97e73..ebcd4327 100644
--- a/src/photos-main.c
+++ b/src/photos-main.c
@@ -55,7 +55,7 @@ main (gint argc, gchar *argv[])
 
     photos_debug_init ();
 
-    g_set_prgname (PACKAGE_TARNAME);
+    g_set_prgname ("org.gnome.Photos");
 
     app = photos_application_new ();
     if (g_getenv ("GNOME_PHOTOS_PERSIST") != NULL)