pcap-log: close pcap_dead_handle on close

Fixes leaked handle on exit.

(cherry picked from commit 8511ef5e2d)

src/log-pcap.c

@@ -1028,6 +1028,10 @@ static void PcapLogDataFree(PcapLogData *pl)
     SCFree(pl->filename);
     SCFree(pl->prefix);
 
+    if (pl->pcap_dead_handle) {
+        pcap_close(pl->pcap_dead_handle);
+    }
+
 #ifdef HAVE_LIBLZ4
     if (pl->compression.format == PCAP_LOG_COMPRESSION_FORMAT_LZ4) {
         SCFree(pl->compression.buffer);