Fix C++ build issue when MBEDTLS_ASN1_PARSE_C is not enabled

Signed-off-by: Jan Bruckner <jan@janbruckner.de>
diff --git a/ChangeLog.d/fix-cpp-compilation-error.txt b/ChangeLog.d/fix-cpp-compilation-error.txt
new file mode 100644
index 0000000..32d86dc
--- /dev/null
+++ b/ChangeLog.d/fix-cpp-compilation-error.txt
@@ -0,0 +1,3 @@
+Bugfix
+   * Fix compilation error in C++ programs when MBEDTLS_ASN1_PARSE_C is
+     disabled.