Return list end as intended in stringlist_get_tail (oops, thanks Roker for the catch

src/stringlist.c

@@ -403,9 +403,8 @@ stringlist_t* stringlist_get_tail(stringlist_t* sl) {
     if (!sl || !sl->value) // empty string is a value, yes?
         return NULL;
     
-    stringlist_t* retval = sl;
     while (sl->next) {
         sl = sl->next;
     }
-    return retval;
+    return sl;
 }