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opusrtp::extract() - call pcap_close for any error condition

Signed-off-by: Ralph Giles <giles@thaumas.net>

--- a/src/opusrtp.c

+++ b/src/opusrtp.c

@@ -803,6 +803,7 @@

   params = malloc(sizeof(state));

   if (!params) {

     fprintf(stderr, "Couldn't allocate param struct.\n");

+    pcap_close(pcap);

     return -1;

   }

   params->linktype = pcap_datalink(pcap);

@@ -810,6 +811,7 @@

   if (!params->stream) {

     fprintf(stderr, "Couldn't allocate stream struct.\n");

     free(params);

+    pcap_close(pcap);

     return -1;

   }

   if (ogg_stream_init(params->stream, rand()) < 0) {

@@ -816,6 +818,7 @@

     fprintf(stderr, "Couldn't initialize Ogg stream state.\n");

     free(params->stream);

     free(params);

+    pcap_close(pcap);

     return -1;

   }

   params->out = fopen("rtpdump.opus", "wb");

@@ -823,6 +826,7 @@

     fprintf(stderr, "Couldn't open output file.\n");

     free(params->stream);

     free(params);

+    pcap_close(pcap);

     return -2;

   }

   params->seq = 0;