Allow override of XSNPRINTF for Windows

Author: Lealem Amedie

wolfssl/wolfcrypt/types.h

@@ -761,8 +761,8 @@ typedef struct w64wrapper {
 
         /* snprintf is used in asn.c for GetTimeString, PKCS7 test, and when
            debugging is turned on */
+        #ifndef XSNPRINTF
         #ifndef USE_WINDOWS_API
-            #ifndef XSNPRINTF
             #if defined(WOLFSSL_ESPIDF) && \
                 (!defined(NO_ASN_TIME) && defined(HAVE_PKCS7))
                     #include<stdarg.h>
@@ -798,7 +798,6 @@ typedef struct w64wrapper {
                 #include <stdio.h>
                 #define XSNPRINTF snprintf
             #endif
-            #endif
         #else
             #if defined(_MSC_VER) || defined(__CYGWIN__) || defined(__MINGW32__)
                 #if defined(_MSC_VER) && (_MSC_VER >= 1900)
@@ -834,6 +833,7 @@ typedef struct w64wrapper {
                 #define XSNPRINTF snprintf
             #endif /* _MSC_VER */
         #endif /* USE_WINDOWS_API */
+        #endif /* !XSNPRINTF */
 
         #if defined(WOLFSSL_CERT_EXT) || defined(OPENSSL_EXTRA) || \
             defined(HAVE_ALPN) || defined(WOLFSSL_SNIFFER)