relive: fail gracefully if no relive data exists

Often, the relive manifest is not available in the beginning of a
conference as a result of configuration errors. Display an empty list
instead of crashing and printing a stacktrace in that situation.

1 files changed, 3 insertions, 0 deletions

diff --git a/model/Relive.php b/model/Relive.php
index 3dfe823..d0e7522 100644
--- a/model/Relive.php
+++ b/model/Relive.php
@@ -15,6 +15,9 @@ class Relive extends ModelBase
 
 	public function getTalks()
 	{
+		if(!file_exists($this->getJsonUrl()))
+			return array();
+
 		$talks = file_get_contents($this->getJsonUrl());
 		$talks = (array)json_decode($talks, true);