checkout: Don't crash when switching away from an invalid branch.

diff --git a/git-add--interactive.perl b/git-add--interactive.perl
index da768ee7acc22e6480f0a067e109239561d43927..b0223c3419301132032fb67519a275e57707df22 100755 (executable)
--- a/git-add--interactive.perl
+++ b/git-add--interactive.perl
@@ -811,11 +811,16 @@ sub help_patch_cmd {
 }
 
 sub patch_update_cmd {
-       my @mods = grep { !($_->{BINARY}) } list_modified('file-only');
+       my @all_mods = list_modified('file-only');
+       my @mods = grep { !($_->{BINARY}) } @all_mods;
        my @them;
 
        if (!@mods) {
-               print STDERR "No changes.\n";
+               if (@all_mods) {
+                       print STDERR "Only binary files changed.\n";
+               } else {
+                       print STDERR "No changes.\n";
+               }
                return 0;
        }
        if ($patch_mode) {