Fix nosafe mode

main.go

@@ -66,9 +66,12 @@ func main() {
 				return
 			}
 
+			filedir := filepath.Dir(file)
+
 			filename := filepath.Base(file)
-			if *nosafe {
+			if !*nosafe {
 				bckp := filename + ".bak"
+				bckp = filepath.Join(filedir, bckp)
 				err := os.Link(file, bckp)
 				if err != nil {
 					Error.Printf("Failed to backup file: %v", err)
@@ -97,6 +100,7 @@ func main() {
 			filehandle.Close()
 
 			newfile := strings.Replace(filename, ext, *to, 1)
+			newfile = filepath.Join(filedir, newfile)
 			log.Printf("Encoding %s to %s", file, newfile)
 
 			buf, err := coder.Encode(image, *quality)