Make ECP error codes more specific
diff --git a/include/polarssl/error.h b/include/polarssl/error.h
index 0c9e451..bc3fb11 100644
--- a/include/polarssl/error.h
+++ b/include/polarssl/error.h
@@ -81,7 +81,7 @@
  * DHM       3   9
  * PKCS5     3   4 (Started from top)
  * RSA       4   9
- * ECP       4   4 (Started from top)
+ * ECP       4   7 (Started from top)
  * MD        5   4
  * CIPHER    6   5
  * SSL       6   6 (Started from top)