[gnome-control-center] background: Add PNM to the list of valid content types

[Debarshi Ray <debarshir src gnome org>]

commit 04ef265fa0a7c53d117f8396e6da61cfe403b509
Author: Debarshi Ray <debarshir gnome org>
Date:   Mon Jan 20 13:56:02 2014 +0100

    background: Add PNM to the list of valid content types
    
    https://bugzilla.gnome.org/show_bug.cgi?id=722599

 panels/background/bg-pictures-source.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/panels/background/bg-pictures-source.c b/panels/background/bg-pictures-source.c
index 038b4f5..fc9eb3b 100644
--- a/panels/background/bg-pictures-source.c
+++ b/panels/background/bg-pictures-source.c
@@ -57,6 +57,7 @@ const char * const content_types[] = {
        "image/jpeg",
        "image/bmp",
        "image/svg+xml",
+       "image/x-portable-anymap",
        NULL
 };