Clearer description for version_get_string_full() regarding 18 bytes
diff --git a/include/polarssl/version.h b/include/polarssl/version.h
index 4e75d87..185b157 100644
--- a/include/polarssl/version.h
+++ b/include/polarssl/version.h
@@ -71,8 +71,11 @@
/**
* Get the full version string ("PolarSSL x.y.z").
*
- * \param string The string that will receive the value.
- * (Should be at least 18 bytes in size)
+ * \param string The string that will receive the value. The PolarSSL version
+ * string will use 18 bytes AT MOST including a terminating
+ * null byte.
+ * (So the buffer should be at least 18 bytes to receive this
+ * version string).
*/
void version_get_string_full( char *string );