fix: 字幕查询越界

lib/pages/danmaku/controller.dart

@@ -17,7 +17,11 @@ class PlDanmakuController {
       int segCount = (videoDuration / segmentLength).ceil();
       requestedSeg = List<bool>.generate(segCount, (index) => false);
     }
+    try {
       queryDanmaku(calcSegment(progress));
+    } catch (e) {
+      print(e);
+    }
   }
 
   void dispose() {
@@ -31,6 +35,7 @@ class PlDanmakuController {
 
   void queryDanmaku(int segmentIndex) async {
     assert(requestedSeg[segmentIndex] == false);
+    if (requestedSeg.length > segmentIndex) {
       requestedSeg[segmentIndex] = true;
       final DmSegMobileReply result = await DanmakaHttp.queryDanmaku(
           cid: cid, segmentIndex: segmentIndex + 1);
@@ -44,6 +49,7 @@ class PlDanmakuController {
         }
       }
     }
+  }
 
   List<DanmakuElem>? getCurrentDanmaku(int progress) {
     int segmentIndex = calcSegment(progress);