hls: Fixing a memory leak

(cherry picked from commit f372e0fc69074921c1f5b02893770fbee8464ef6)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/stream_filter/httplive.c

@@ -2316,6 +2316,7 @@ static int Peek(stream_t *s, const uint8_t **pp_peek, unsigned int i_peek)
             peeked = block_Realloc (peeked, 0, i_peek);
         if (peeked == NULL)
             return 0;
+        p_sys->peeked = peeked;
 
         memcpy(peeked->p_buffer, p_buff, i_buff);
         curlen = i_buff;