===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/unifdef/unifdef.c,v
retrieving revision 1.24
retrieving revision 1.25
diff -u -r1.24 -r1.25
--- src/usr.bin/unifdef/unifdef.c	2015/10/09 01:37:09	1.24
+++ src/usr.bin/unifdef/unifdef.c	2015/12/04 21:23:19	1.25
@@ -56,7 +56,7 @@
 
 static const char copyright[] =
     #include "version.h"
-    "@(#) $Author: deraadt $\n"
+    "@(#) $Author: mmcc $\n"
     "@(#) $URL: http://dotat.at/prog/unifdef $\n"
 ;
 
@@ -425,7 +425,7 @@
 
 	process();
 
-	if (backext != NULL) {
+	if (backext != NULL && *backext != '\0') {
 		char *backname = astrcat(ofn, backext);
 		if (rename(ofn, backname) < 0)
 			err(2, "can't rename \"%s\" to \"%s\"", ofn, backname);