[lldb][swig] Use the correct variable in the return statement

The issue was introduced in
llvm#104523.

The code introduces the `ret_val` variable but does not use it. Instead
it returns a pointer, which gets implicitly converted to bool.

(cherry picked from commit 6528157)

lldb/bindings/python/python-wrapper.swig

@@ -837,7 +837,7 @@ bool lldb_private::python::SWIGBridge::LLDBSwigPython_ShouldHide(
   bool ret_val = result ? PyObject_IsTrue(result) : false;
   Py_XDECREF(result);
 
-  return result;
+  return ret_val;
 }
 
 void *lldb_private::python::SWIGBridge::LLDBSWIGPython_GetDynamicSetting(