fix clearing errors

Author: ngoldbaum

stringdtype/stringdtype/src/dtype.c

@@ -582,6 +582,8 @@ static void
 stringdtype_dealloc(StringDTypeObject *self)
 {
     Py_XDECREF(self->na_object);
+    npy_string_free(&self->packed_default_string);
+    npy_string_free(&self->packed_na_name);
     PyArrayDescr_Type.tp_dealloc((PyObject *)self);
 }
 

stringdtype/stringdtype/src/static_string.c

@@ -178,7 +178,7 @@ npy_string_free(npy_packed_static_string *str)
 {
     if (is_not_a_vstring(str)) {
         // zero out
-        memcpy(str, &NPY_EMPTY_STRING, sizeof(npy_static_string));
+        memcpy(str, NPY_EMPTY_STRING, sizeof(npy_packed_static_string));
     }
     else {
         _npy_static_string_u *str_u = (_npy_static_string_u *)str;