Transparent header check function fix

if ( ! function_exists( 'zakra_is_header_transparent_enabled' ) ) :
	/**
	 * Check if header transparent is enabled.
	 */
	function zakra_is_header_transparent_enabled() {

		// Zakra Pro Customizer.
		$customizer_result = apply_filters( 'zakra_header_transparency_filter', false );

		// Meta box.
		$meta_result = get_post_meta( zakra_get_post_id(), 'zakra_transparent_header', true );

        // Disabled transparent if it is not post and not page.
        if ( ! is_singular('page') && ! is_singular('post') ) {
            return false;
        }

		if ( '0' == $meta_result ) { // Disabled in meta.
			return false;
		} elseif ( 'customizer' == $meta_result && '0' == $customizer_result ) { // Disabled in Customizer
			return false;
		}

		return apply_filters( 'zakra_header_transparency_enable', true );

	}
endif;