fftools/ffplay: fix typo in frame_queue_destory

Not sure if the function naming frame_queue_destory is intended because
"destory" is not really a word. Changing it to "destroy" makes more sense.
Signed-off-by: QiTong Li <liqitong@163.com>
Signed-off-by: Marton Balint <cus@passwd.hu>

fftools/ffplay.c

@@ -696,7 +696,7 @@ static int frame_queue_init(FrameQueue *f, PacketQueue *pktq, int max_size, int
     return 0;
 }
 
-static void frame_queue_destory(FrameQueue *f)
+static void frame_queue_destroy(FrameQueue *f)
 {
     int i;
     for (i = 0; i < f->max_size; i++) {
@@ -1252,9 +1252,9 @@ static void stream_close(VideoState *is)
     packet_queue_destroy(&is->subtitleq);
 
     /* free all pictures */
-    frame_queue_destory(&is->pictq);
-    frame_queue_destory(&is->sampq);
-    frame_queue_destory(&is->subpq);
+    frame_queue_destroy(&is->pictq);
+    frame_queue_destroy(&is->sampq);
+    frame_queue_destroy(&is->subpq);
     SDL_DestroyCond(is->continue_read_thread);
     sws_freeContext(is->sub_convert_ctx);
     av_free(is->filename);