Fix macroization of inline in C++
When compiling as C++, MSVC complains about our macroization of a keyword.
Stop doing that as we know inline is always available in C++
diff --git a/library/debug.c b/library/debug.c
index 070f63a..4752ab1 100644
--- a/library/debug.c
+++ b/library/debug.c
@@ -42,7 +42,8 @@
#define mbedtls_snprintf snprintf
#endif
-#if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && !defined(inline)
+#if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \
+ !defined(inline) && !defined(__cplusplus)
#define inline __inline
#endif