Made inspectdb used Cursor.description.display_size for CharFields' max_length.

internal_size is size for fixed-size types not for char types.

django/db/backends/sqlite3/introspection.py

@@ -119,10 +119,10 @@ class DatabaseIntrospection(BaseDatabaseIntrospection):
             FieldInfo(
                 name,
                 data_type,
-                None,
                 get_field_size(data_type),
                 None,
                 None,
+                None,
                 not notnull,
                 default,
                 collations.get(name),