Undefined variable: $rmore

The variable $rmore is defined inside a conditional loop and called call outside of it.
This can create an event where the $rmore will be undefined in line 192

if($strip_desc != 0){
   $desc = wp_html_excerpt( $desc, $strip_desc );
   $rmore = (!empty($read_more)) ?  '<a href="' . $link . '" title="Read more"' . $newtab . '>' . $read_more . '</a>' : '';

			if ( '[...]' == substr( $desc, -5 ) )
				$desc = substr( $desc, 0, -5 );
						elseif ( '[…]' != substr( $desc, -10 ) )
							$desc .= '';

						$desc = esc_html( $desc );
					}

					$desc = $thumb . $desc . ' ' . $rmore;

https://wordpress.org/plugins/super-rss-reader/