Check correctly for unknown/unset metadata.

diff --git a/src/main/java/net/pterodactylus/sonitus/data/source/MultiSource.java b/src/main/java/net/pterodactylus/sonitus/data/source/MultiSource.java
index 0ff1126..565ff3e 100644 (file)
--- a/src/main/java/net/pterodactylus/sonitus/data/source/MultiSource.java
+++ b/src/main/java/net/pterodactylus/sonitus/data/source/MultiSource.java
@@ -136,7 +136,7 @@ public class MultiSource extends AbstractFilter {
 
        @Override
        public Metadata metadata() {
-               if (super.metadata() == null) {
+               if (super.metadata() == Metadata.UNKNOWN) {
                        /* no metadata yet, wait for it. */
                        waitForNewSource();
                        sourceChanged = false;