add default

Author: Rom1-B

templates/fields.html.twig

@@ -112,7 +112,7 @@
             {% set dropdown_itemtype = call("PluginFieldsDropdown::getClassname", [name]) %}
         {% endif %}
         {% set name_fk = call("getForeignKeyFieldForItemType", [dropdown_itemtype]) %}
-        {{ macros.dropdownField(dropdown_itemtype, name_fk, value, label, field_options|merge(dropdown_options)) }}
+        {{ macros.dropdownField(dropdown_itemtype, name_fk, value, label, field_options|merge(dropdown_options|default({}))) }}
 
     {% elseif type matches '/^dropdown-.+/i' %}
         {% if not massiveaction %}
@@ -125,7 +125,7 @@
             {% if field['multiple'] %}
                 {% set dropdown_options = dropdown_options|merge({'multiple': true}) %}
             {% endif %}
-            {{ macros.dropdownField(field['dropdown_class'], name, value, label, field_options|merge(dropdown_options)) }}
+            {{ macros.dropdownField(field['dropdown_class'], name, value, label, field_options|merge(dropdown_options|default({}))) }}
         {% endif %}
 
     {% elseif type == 'glpi_item' %}