Make the documentation internal.

git-svn-id: svn+ssh://svn.berlios.de/svnroot/repos/libssh/trunk@720 7dcaeef0-15fb-0310-b436-a5af3365683c

libssh/error.c

@@ -39,6 +39,8 @@
  */
 
 /**
+ * @internal
+ *
  * @brief Registers an error with a description.
  *
  * @param  error       The class of error.