changed enum type name to `ZSTD_ErrorCode`
diff --git a/lib/error_private.h b/lib/error_private.h
index 0e76864..c0c3f49 100644
--- a/lib/error_private.h
+++ b/lib/error_private.h
@@ -64,7 +64,7 @@
 /*-****************************************
 *  Customization
 ******************************************/
-typedef ZSTD_errorCode ERR_enum;
+typedef ZSTD_ErrorCode ERR_enum;
 #define PREFIX(name) ZSTD_error_##name