[rygel/wip/dvd: 102/103] server: Avoid crash on empty protocol info

[Jens Georg <jensgeorg src gnome org>]

commit fb0dc2a241333a0583f004c1daa0e9b0c9d4bce6
Author: Jens Georg <mail jensge org>
Date:   Wed Sep 16 14:24:08 2015 +0200

    server: Avoid crash on empty protocol info
    
    Signed-off-by: Jens Georg <mail jensge org>

 .../rygel-http-resource-handler.vala               |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/librygel-server/rygel-http-resource-handler.vala 
b/src/librygel-server/rygel-http-resource-handler.vala
index 1c8009c..f2aceab 100644
--- a/src/librygel-server/rygel-http-resource-handler.vala
+++ b/src/librygel-server/rygel-http-resource-handler.vala
@@ -56,7 +56,7 @@ internal class Rygel.HTTPMediaResourceHandler : HTTPGetHandler {
         var protocol_info = media_resource.get_protocol_info (replacements);
         if (protocol_info != null) {
             var pi_fields = protocol_info.to_string ().split (":", 4);
-            if (pi_fields[3] != null) {
+            if (pi_fields != null && pi_fields[3] != null) {
                 request.msg.response_headers.append ("contentFeatures.dlna.org",
                                                      pi_fields[3]);
             }