Merge pull request #11397 from atm-josselin/FIX_product_document_and_…

…special_characters

FIX : filepath of generated documents doesn't handle products with sp…

htdocs/product/class/product.class.php

@@ -429,7 +429,7 @@ function create($user,$notrigger=0)
             $error=0;
 
         // Clean parameters
-        $this->ref = dol_string_nospecial(trim($this->ref));
+        $this->ref = dol_sanitizeFileName(dol_string_nospecial(trim($this->ref)));
         $this->label = trim($this->label);
         $this->price_ttc=price2num($this->price_ttc);
         $this->price=price2num($this->price);