ios/VideoToolbox: serial should be int

ios/IJKMediaPlayer/IJKMediaPlayer/ijkmedia/ijkplayer/ios/pipeline/IJKVideoToolBox.h

@@ -47,7 +47,7 @@ typedef struct VTBPicture {
 typedef struct sort_queue {
     double              dts;
     double              pts;
-    double              serial;
+    int                 serial;
     double              sort;
     int64_t             width;
     int64_t             height;
@@ -77,7 +77,7 @@ typedef struct VideoToolBoxContext {
     int32_t                     m_max_ref_frames;
     bool                        m_convert_bytestream;
     bool                        m_convert_3byteTo4byteNALSize;
-    double                      serial;
+    int                         serial;
     volatile double             last_sort;
     bool                        dealloced;
     int                         m_buffer_deep;

ios/IJKMediaPlayer/IJKMediaPlayer/ijkmedia/ijkplayer/ios/pipeline/IJKVideoToolBox.m

@@ -215,7 +215,7 @@ static int vtb_queue_picture(
 
 
 
-static sort_queue *CreateDictionaryWithPkt(double time, double dts, double pts,double pkt_serial)
+static sort_queue *CreateDictionaryWithPkt(double time, double dts, double pts, int pkt_serial)
 {
     sort_queue *frame = (sort_queue *)mallocz(sizeof(sort_queue));
     frame->sort   = time;