Add padding to arena and test_func_result structs

src/tester/tester.h

@@ -1,20 +1,26 @@
 #ifndef TESTER_H
 #define TESTER_H
 
+#include "misc_utils.h"
+#include "platform.h"
 #include <stdbool.h>
 
 #ifdef __cplusplus
 extern "C" {
 #endif // __cplusplus
 
-#define wapp_tester_result(test_passed)                                        \
-  ((TestFuncResult){.name = __func__, .passed = test_passed})
+#define wapp_tester_result(PASSED)                                             \
+  ((TestFuncResult){.name = __func__, .passed = PASSED})
 #define wapp_tester_run_tests(...) run_tests(__VA_ARGS__, NULL)
 
 typedef struct test_func_result TestFuncResult;
 struct test_func_result {
   const char *name;
   bool passed;
+
+#ifdef WAPP_PLATFORM_WINDOWS
+  wapp_misc_utils_padding_size(sizeof(const char *) + sizeof(bool));
+#endif // WAPP_PLATFORM_WINDOWS
 };
 
 typedef TestFuncResult(TestFunc)(void);