jscript: Implicitly turn CC on for @if instruction.

dlls/jscript/lex.c

@@ -1051,6 +1051,9 @@ static int cc_token(parser_ctx_t *ctx, void *lval)
     }
 
     if(!check_keyword(ctx, ifW, NULL)) {
+        if(!init_cc(ctx))
+            return -1;
+
         if(!skip_spaces(ctx) || *ctx->ptr != '(')
             return lex_error(ctx, JS_E_MISSING_LBRACKET);
 

dlls/jscript/tests/run.c

@@ -2185,6 +2185,12 @@ static BOOL run_tests(void)
 
     parse_script_a("@set @t=2\nok(@t === 2, '@t = ' + @t);");
 
+    SET_EXPECT(global_success_d);
+    SET_EXPECT(global_success_i);
+    parse_script_a("@if(true)\nif(@_jscript) reportSuccess();\n@end");
+    CHECK_CALLED(global_success_d);
+    CHECK_CALLED(global_success_i);
+
     run_from_res("lang.js");
     run_from_res("api.js");
     run_from_res("regexp.js");