judge: bug fix

packages/hydrojudge/package.json

@@ -1,7 +1,7 @@
 {
     "name": "@hydrooj/hydrojudge",
     "bin": "bin/hydrojudge.js",
-    "version": "2.13.2",
+    "version": "2.13.3",
     "main": "package.json",
     "author": "undefined <i@undefined.moe>",
     "repository": "https://github.com/hydro-dev/Hydro.git",

packages/hydrojudge/src/cases.ts

@@ -195,7 +195,7 @@ function isValidConfig(config) {
     }
     const memMax = max(config.subtasks.map((subtask) => subtask.memory));
     if (memMax > parseMemoryMB(getConfig('memoryMax'))) throw new FormatError('Memory limit larger than memory_max');
-    if (['default', 'strict'].includes(config.checker_type || 'default') && !config.checker) {
+    if (!['default', 'strict'].includes(config.checker_type || 'default') && !config.checker) {
         throw new FormatError('You did not specify a checker.');
     }
 }