Makes sure the list is not empty before building the filter

amethyst/src/main/java/com/vitorpamplona/amethyst/service/relayClient/reqCommand/event/watchers/FilterRepliesAndReactionsToNotes.kt

@@ -81,6 +81,7 @@ fun filterRepliesAndReactionsToNotes(
         val since = since?.get(it.key)?.time
         val sortedList = it.value.sorted()
         val relay = it.key
+        if (sortedList.isNotEmpty()) {
             listOf(
                 RelayBasedFilter(
                     relay = relay,
@@ -114,5 +115,8 @@ fun filterRepliesAndReactionsToNotes(
                         ),
                 ),
             )
+        } else {
+            emptyList()
+        }
     }
 }