Fix warnings from -pedantic
diff --git a/include/mbedtls/check_config.h b/include/mbedtls/check_config.h
index df222ce..a679780 100644
--- a/include/mbedtls/check_config.h
+++ b/include/mbedtls/check_config.h
@@ -489,4 +489,11 @@
#error "MBEDTLS_X509_CSR_WRITE_C defined, but not all prerequisites"
#endif
+/*
+ * Avoid warning from -pedantic. This is a convenient place for this
+ * workaround since this is included by every single file before the
+ * #if defined(MBEDTLS_xxx_C) that results in emtpy translation units.
+ */
+typedef int mbedtls_iso_c_forbids_empty_translation_units;
+
#endif /* MBEDTLS_CHECK_CONFIG_H */