checkpatch.pl shouldn't warn about a "Missing Signed-off-by: line by
nominal patch author" if there is no nominal patch author.  Without
this change, checkpatch always gives me the following warning:

	WARNING: Missing Signed-off-by: line by nominal patch author ''

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>



 scripts/checkpatch.pl |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: usb-devel/scripts/checkpatch.pl
===================================================================
--- usb-devel.orig/scripts/checkpatch.pl
+++ usb-devel/scripts/checkpatch.pl
@@ -6673,7 +6673,7 @@ sub process {
 		if ($signoff == 0) {
 			ERROR("MISSING_SIGN_OFF",
 			      "Missing Signed-off-by: line(s)\n");
-		} elsif (!$authorsignoff) {
+		} elsif ($author ne '' && !$authorsignoff) {
 			WARN("NO_AUTHOR_SIGN_OFF",
 			     "Missing Signed-off-by: line by nominal patch author '$author'\n");
 		}