fix syntax analysis in visit_Subscript

mcpyrate/expander.py

@@ -166,8 +166,11 @@ def visit_Subscript(self, subscript):
  # because things like `(some_expr_macro[tree])[subscript_expression]` are valid. This
  # is actually exploited by `h`, as in `q[h[target_macro][tree_for_target_macro]]`.
  candidate = subscript.value
- macroname, macroargs = destructure_candidate(candidate, filename=self.filename)
+ macroname, macroargs = destructure_candidate(candidate, filename=self.filename,
+ _validate_call_syntax=False)
  if self.ismacrocall(macroname, macroargs, "expr"):
+ # Now we know it's a macro invocation, so we can validate the parenthesis syntax to pass arguments.
+ macroname, macroargs = destructure_candidate(candidate, filename=self.filename)
  kw = {"args": macroargs}
  if sys.version_info >= (3, 9, 0): # Python 3.9+: no ast.Index wrapper
  tree = subscript.slice