-/* Returns true if S[] is a missing value for V, false otherwise.
- S[] must contain exactly as many characters as V's width.
- V must be a string variable. */
-bool
-var_is_str_missing (const struct variable *v, const uint8_t s[],
- enum mv_class class)
+/* Returns MV_USER if VALUE is user-missing for V and otherwise 0. V must be
+ a string variable. */
+enum mv_class
+var_is_str_missing (const struct variable *v, const uint8_t s[])