[ruby/prism] FSL follow-up

https://github.com/ruby/prism/commit/097fd2a54f

prism/options.c

@@ -37,7 +37,7 @@ pm_options_offset_set(pm_options_t *options, uint32_t offset) {
  */
 PRISM_EXPORTED_FUNCTION void
 pm_options_frozen_string_literal_set(pm_options_t *options, bool frozen_string_literal) {
-    options->frozen_string_literal = frozen_string_literal ? 1 : -1;
+    options->frozen_string_literal = frozen_string_literal ? PM_OPTIONS_FROZEN_STRING_LITERAL_ENABLED : PM_OPTIONS_FROZEN_STRING_LITERAL_DISABLED;
 }
 
 /**

prism/prism.c

@@ -7183,9 +7183,9 @@ parser_lex_magic_comment_encoding(pm_parser_t *parser) {
 static void
 parser_lex_magic_comment_frozen_string_literal_value(pm_parser_t *parser, const uint8_t *start, const uint8_t *end) {
     if ((start + 4 <= end) && pm_strncasecmp(start, (const uint8_t *) "true", 4) == 0) {
-        parser->frozen_string_literal = 1;
+        parser->frozen_string_literal = PM_OPTIONS_FROZEN_STRING_LITERAL_ENABLED;
     } else if ((start + 5 <= end) && pm_strncasecmp(start, (const uint8_t *) "false", 5) == 0) {
-        parser->frozen_string_literal = -1;
+        parser->frozen_string_literal = PM_OPTIONS_FROZEN_STRING_LITERAL_DISABLED;
     }
 }
 
@@ -18922,7 +18922,7 @@ pm_parser_init(pm_parser_t *parser, const uint8_t *source, size_t size, const pm
         .in_keyword_arg = false,
         .current_param_name = 0,
         .semantic_token_seen = false,
-        .frozen_string_literal = 0,
+        .frozen_string_literal = PM_OPTIONS_FROZEN_STRING_LITERAL_UNSET,
         .current_regular_expression_ascii_only = false
     };