[FIX] Correction de la Notice lorsque pas d'argument

src/UnicaenRenderer/Service/Macro/MacroService.php

@@ -176,8 +176,9 @@ class MacroService {
     {
         $code = str_replace('VAR[','', $code);
         $code = str_replace(']','', $code);
-        $parameter = explode("|",$code)[1];
-        $code = explode("|",$code)[0];
+        $exploded = explode("|",$code);
+        $parameter = ($exploded[1])??null;
+        $code = ($exploded[0])??null;
         $macro = $this->getMacroByCode($code);
 
         if ($macro !== null) {