instance.c: Fix a memory leak reported by scan-build.

  instance.c:280:10: warning: Potential leak of memory pointed to by 'new_channelmap'
                  pdch = g_slist_nth(di->decoder->channels, i)->data;
                         ^~~~~~~~~~~

1 files changed, 1 insertions, 0 deletions

diff --git a/instance.c b/instance.c
index f8cd2c6..a94118f 100644
--- a/instance.c
+++ b/instance.c
@@ -280,6 +280,7 @@ SRD_API int srd_inst_channel_set_all(struct srd_decoder_inst *di,
 		pdch = g_slist_nth(di->decoder->channels, i)->data;
 		srd_err("Required channel '%s' (index %d) was not specified.",
 			pdch->id, i);
+		g_free(new_channelmap);
 		return SRD_ERR;
 	}