- Fixed compiler warning for unreferenced ret in md_file() when POLARSSL_FS_IO not declared

include/polarssl/error.h

diff --git a/include/polarssl/error.h b/include/polarssl/error.h
index 78ad362..9c17071 100644
--- a/include/polarssl/error.h
+++ b/include/polarssl/error.h
@@ -72,8 +72,8 @@
  * X509     2   21
  * DHM      3   6
  * RSA      4   9
- * MD       5   1
- * CIPER    6   1
+ * MD       5   4
+ * CIPHER   6   5
  * SSL      7   30
  *
  * Module dependent error code (5 bits 0x.08.-0x.F8.)

include/polarssl/md.h

diff --git a/include/polarssl/md.h b/include/polarssl/md.h
index f62ef20..88596cb 100644
--- a/include/polarssl/md.h
+++ b/include/polarssl/md.h
@@ -42,8 +42,7 @@
 #define POLARSSL_ERR_MD_FEATURE_UNAVAILABLE                -0x5080  /**< The selected feature is not available. */
 #define POLARSSL_ERR_MD_BAD_INPUT_DATA                     -0x5100  /**< Bad input parameters to function. */
 #define POLARSSL_ERR_MD_ALLOC_FAILED                       -0x5180  /**< Failed to allocate memory. */
-#define POLARSSL_ERR_MD_FILE_OPEN_FAILED                   -0x5200  /**< Opening of file failed. */
-#define POLARSSL_ERR_MD_FILE_READ_FAILED                   -0x5280  /**< Failure when reading from file. */
+#define POLARSSL_ERR_MD_FILE_IO_ERROR                      -0x5200  /**< Opening or reading of file failed. */
 
 typedef enum {
     POLARSSL_MD_NONE=0,