XMEMSET with WC_CALLOC_VAR_EX

switch WC_ALLOC_VAR_EX with XMEMSET to WC_CALLOC_VAR_EX

fix XMEMSET call for WC_CALLOC_VAR_EX

Author: rlm2002

wolfcrypt/test/test.c

@@ -20187,10 +20187,9 @@ WOLFSSL_TEST_SUBROUTINE wc_test_ret_t random_bank_test(void)
     byte outbuf1[16], outbuf2[16];
     int i;
 
-    WC_ALLOC_VAR_EX(bank, struct wc_rng_bank, 1, HEAP_HINT,
+    WC_CALLOC_VAR_EX(bank, struct wc_rng_bank, 1, HEAP_HINT,
                     DYNAMIC_TYPE_TMP_BUFFER,
                     return WC_TEST_RET_ENC_EC(MEMORY_E));
-    XMEMSET(bank, 0, sizeof(*bank));
 
     WC_ALLOC_VAR_EX(rng, WC_RNG, 1, HEAP_HINT,
                     DYNAMIC_TYPE_TMP_BUFFER,

wolfssl/wolfcrypt/types.h

@@ -912,9 +912,9 @@ enum {
         WC_DO_NOTHING
     #define WC_VAR_OK(VAR_NAME) 1
     #define WC_CALLOC_VAR(VAR_NAME, VAR_TYPE, VAR_SIZE, HEAP)        \
-        XMEMSET(VAR_NAME, 0, sizeof(var))
+        XMEMSET(VAR_NAME, 0, sizeof(VAR_TYPE))
     #define WC_CALLOC_VAR_EX(VAR_NAME, VAR_TYPE, VAR_SIZE, HEAP, TY, ONFAIL)\
-        WC_DO_NOTHING
+        XMEMSET(VAR_NAME, 0, sizeof(VAR_TYPE))
     #define WC_FREE_VAR(VAR_NAME, HEAP) WC_DO_NOTHING \
         /* nothing to free, its stack */
     #define WC_FREE_VAR_EX(VAR_NAME, HEAP, TYPE) WC_DO_NOTHING