[FIX] tools: fix TypeError in literal_eval

A TypeError is thrown when an AST node is passed to `literal_eval`
because a string is expected and the object has no len().

Check the type of the expression and make sure it's a string before
calling len() on it.

closes odoo/odoo#126844

X-original-commit: 28b5cbb3
Signed-off-by: Vranckx Florian (flvr) <flvr@odoo.com>

odoo/tools/_monkeypatches.py

@@ -44,7 +44,7 @@ def literal_eval(expr):
         else:
             _logger.error("ODOO_LIMIT_LITEVAL_BUFFER has to be an integer, defaulting to 100KiB")
 
-    if len(expr) > buffer_size:
+    if isinstance(expr, str) and len(expr) > buffer_size:
         raise ValueError("expression can't exceed buffer limit")
 
     return orig_literal_eval(expr)