Fixup md.h: Fix use of `inline` keyword in MSVC
diff --git a/include/mbedtls/md.h b/include/mbedtls/md.h
index 104c577..2776568 100644
--- a/include/mbedtls/md.h
+++ b/include/mbedtls/md.h
@@ -35,6 +35,11 @@
#include MBEDTLS_CONFIG_FILE
#endif
+#if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \
+ !defined(inline) && !defined(__cplusplus)
+#define inline __inline
+#endif
+
#define MBEDTLS_ERR_MD_FEATURE_UNAVAILABLE -0x5080 /**< The selected feature is not available. */
#define MBEDTLS_ERR_MD_BAD_INPUT_DATA -0x5100 /**< Bad input parameters to function. */
#define MBEDTLS_ERR_MD_ALLOC_FAILED -0x5180 /**< Failed to allocate memory. */