1. SetName() should return error if country code isn't 2 bytes.

2. MakeCert() was not checking return codes correctly for the SetFoo()
    functions.
3. Added error code for invalid country code length.

wolfcrypt/src/error.c

@@ -380,6 +380,9 @@ const char* wc_GetErrorString(int error)
     case WC_KEY_SIZE_E:
         return "Key size error, either too small or large";
 
+    case ASN_COUNTRY_SIZE_E:
+        return "Country code size error, either too small or large";
+
     default:
         return "unknown error number";