Add error handling for getSource()

apps/files_sharing/lib_share.php

@@ -85,12 +85,16 @@ class OC_SHARE {
 		$parts = explode("/", $target);
 		$query = OC_DB::prepare("SELECT source FROM *PREFIX*sharing WHERE target = ? AND uid_shared_with = ?");
 		$result = $query->execute(array($parts[0], $_SESSION['user_id']))->fetchAll();
-		$source = $result[0]['source'];
-		// Add the $parts back in
-		foreach (array_slice($parts, 1) as $part) {
-			$source .= $part;
+		if (count($result) > 0) {
+			$source = $result[0]['source'];
+			// Add the $parts back in
+			foreach (array_slice($parts, 1) as $part) {
+				$source .= $part;
+			}
+			return $source;
+		} else {
+			return false;
 		}
-		return $source;
 	}
 	
 	/**