[-] BO : #PSTEST-1081 : fix bug in AdminProductController when we add a new language

admin-dev/themes/default/template/controllers/products/textarea_lang.tpl

@@ -29,7 +29,7 @@
 <div class="lang_{$language.id_lang}" style="{if !$language.is_default}display:none;{/if}float: left;">
 	<textarea cols="100" rows="10" type="text" id="{$input_name}_{$language.id_lang}" 
 		name="{$input_name}_{$language.id_lang}" 
-		class="autoload_rte" >{$input_value[$language.id_lang]|htmlentitiesUTF8}</textarea>
+		class="autoload_rte" >{if isset($input_value[$language.id_lang])}{$input_value[$language.id_lang]|htmlentitiesUTF8}{/if}</textarea>
 	<span class="counter" max="{if isset($max)}{$max}{else}none{/if}"></span>
 	<span class="hint" name="help_box">{$hint|default:''}<span class="hint-pointer">&nbsp;</span></span>
 </div>