Error: Undefined variable: post_title

When enabling debug mode in WP I get the following notices:
Notice: Undefined variable: post_title in /app/web/wp-content/plugins/ultimate-responsive-image-slider/layout.php on line 332

Seems to be related to:
Error on testing site, undefined

I fixed it by moving the assignment of $post_title outside of the if condition.

---
 .../plugins/ultimate-responsive-image-slider/layout.php       | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/web/wp-content/plugins/ultimate-responsive-image-slider/layout.php b/web/wp-content/plugins/ultimate-responsive-image-slider/layout.php
index 2bcfeb6..b9af0cd 100644
--- a/web/wp-content/plugins/ultimate-responsive-image-slider/layout.php
+++ b/web/wp-content/plugins/ultimate-responsive-image-slider/layout.php
@@ -224,8 +224,10 @@ document.addEventListener("DOMContentLoaded", function(event) {
 /* Custom CSS */
 <?php echo $WRIS_L3_Custom_CSS; ?>
 </style>
+<?php $post_title = get_the_title( $post_id );?>
 <?php  if($WRIS_L3_Slide_Title) { ?>
-<h3 class="uris-slider-post-title"><?php echo $post_title = get_the_title( $post_id ); ?></h3>
+
+<h3 class="uris-slider-post-title"><?php echo $post_title; ?></h3>
 <?php } if($TotalSlideIds>0){ ?>
 		<div id="slider-pro-3-<?php echo $post_id; ?>" class="slider-pro">
 			<!---- slides div start ---->
--