Assert that time_t is 64-bit

Author: jkotas

src/native/libs/System.Security.Cryptography.Native/pal_x509.c

@@ -1354,14 +1354,8 @@ int32_t CryptoNative_X509DecodeOcspToExpiration(const uint8_t* buf, int32_t len,
             time_t expiration_t = 0;
             X509VerifyStatusCode code = CheckOcspGetExpiry(req, resp, subject, issuers[0], ctx, &canCache, &expiration_t);
 
-            if (sizeof(time_t) == sizeof(int64_t))
-            {
-                *expiration = (int64_t)expiration_t;
-            }
-            else if (sizeof(time_t) == sizeof(int32_t))
-            {
-                *expiration = (int32_t)expiration_t;
-            }
+            c_static_assert(sizeof(time_t) == sizeof(int64_t));
+            *expiration = (int64_t)expiration_t;
 
             if (code == PAL_X509_V_OK || code == PAL_X509_V_ERR_CERT_REVOKED)
             {