sbuild:: check that we have the right number of .changes files

Check that the set of .changes files found is as we expect, before
calling mergechanges.

1 files changed, 1 insertions, 1 deletions

diff --git a/dgit b/dgit
index de7ee0c..32eaa2a 100755
--- a/dgit
+++ b/dgit
@@ -3153,7 +3153,7 @@ sub cmd_sbuild {
 	    or $a cmp $b
     } @changesfiles;
     fail "wrong number of different changes files (@changesfiles)"
-	unless @changesfiles;
+	unless @changesfiles==2;
     runcmd_ordryrun_local @mergechanges, @changesfiles;
     my $multichanges = "${package}_".(stripepoch $version)."_multi.changes";
     if (act_local()) {