Fix count() warnings in recommendation plugins

Use count() instead of truthy check on results collections to avoid
PHP warnings when collection objects evaluate differently than arrays.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Nicholas J. Kisseberth

core/plugins/publications/recommendations/views/browse/tmpl/default.php

@@ -18,7 +18,7 @@
 		<p><?php echo Lang::txt('PLG_PUBLICATION_RECOMMENDATIONS_EXPLANATION'); ?></p>
 	</div>
 	<div class="subject" id="recommendations-subject">
-		<?php if ($this->results) { ?>
+		<?php if (count($this->results)) { ?>
 			<ul>
 				<?php
 				foreach ($this->results as $line)

core/plugins/publications/recommendations/views/browse/tmpl/mini.php

@@ -12,7 +12,7 @@
 ?>
 <div id="recommendations">
 	<h3><?php echo Lang::txt('PLG_PUBLICATION_RECOMMENDATIONS_HEADER'); ?></h3>
-	<?php if ($this->results) { ?>
+	<?php if (count($this->results)) { ?>
 		<ul>
 			<?php
 			foreach ($this->results as $line)

core/plugins/resources/recommendations/views/browse/tmpl/default.php

@@ -13,7 +13,7 @@
 <div id="recommendations">
 	<h3><?php echo Lang::txt('PLG_RESOURCES_RECOMMENDATIONS_HEADER'); ?></h3>
 	<div class="subject" id="recommendations-subject" data-base="<?php echo Request::base(true); ?>">
-		<?php if ($this->results) { ?>
+		<?php if (count($this->results)) { ?>
 			<ul>
 			<?php foreach ($this->results as $line) { ?>
 				<li>

core/plugins/resources/recommendations/views/browse/tmpl/mini.php

@@ -11,7 +11,7 @@
 <div class="container" id="recommendations">
 	<h3><?php echo Lang::txt('PLG_RESOURCES_RECOMMENDATIONS_HEADER'); ?></h3>
 
-	<?php if ($this->results) { ?>
+	<?php if (count($this->results)) { ?>
 		<ul>
 		<?php foreach ($this->results as $line) { ?>
 			<li>