Don't check for empty message in listen mode.

CHANGELOG.md

@@ -1,6 +1,8 @@
 # Changelog
 
 ## Unreleased
+### Changed
+- Don't check for empty message when `--listen` is used.
 
 ## [v0.5.2] 2022-09-29
 ### Added

main.go

@@ -296,7 +296,7 @@ func main() {
 	message = reg.ReplaceAllString(message, "")
 
 	// Exit if message is empty.
-	if message == "" && !*flagInteractive {
+	if message == "" && !*flagInteractive && !*flagListen {
 		os.Exit(0)
 	}