Fix bug for php 5.3

bl-kernel/page.class.php

@@ -382,7 +382,7 @@ class Page {
 	}
 
 	// (boolean) Returns TRUE if the page is static, FALSE otherwise
-	public function static()
+	public function isStatic()
 	{
 		return ($this->getValue('status')=='static');
 	}

bl-themes/blogx/php/page.php

@@ -12,7 +12,7 @@
 			<h1 class="title"><?php echo $page->title(); ?></h1>
 		</a>
 
-		<?php if (!$page->static()): ?>
+		<?php if (!$page->isStatic()): ?>
 		<!-- Creation date -->
 		<h6 class="card-subtitle mb-3 text-muted"><?php echo $page->date(); ?> - <?php echo $Language->get('Reading time') . ': ' . $page->readingTime() ?></h6>
 		<?php endif ?>