Fix error code in pk.h
diff --git a/include/polarssl/error.h b/include/polarssl/error.h
index c326154..f8c23e6 100644
--- a/include/polarssl/error.h
+++ b/include/polarssl/error.h
@@ -76,7 +76,8 @@
  * Name     ID  Nr of Errors
  * PEM      1   9
  * PKCS#12  1   4 (Started from top)
- * X509     2   23
+ * X509     2   25
+ * PK       2   1 (Started from top)
  * DHM      3   6
  * PKCS5    3   4 (Started from top)
  * RSA      4   9