Add debug info for cert/suite selection
diff --git a/library/error.c b/library/error.c
index 3fbec5d..44b1142 100644
--- a/library/error.c
+++ b/library/error.c
@@ -450,7 +450,7 @@
         if( use_ret == -(POLARSSL_ERR_SSL_WAITING_SERVER_HELLO_RENEGO) )
             snprintf( buf, buflen, "SSL - Unexpected message at ServerHello in renegotiation" );
         if( use_ret == -(POLARSSL_ERR_SSL_NO_USABLE_CIPHERSUITE) )
-            snprintf( buf, buflen, "SSL - None of the common ciphersuites is usable (eg, no suitable certificate)" );
+            snprintf( buf, buflen, "SSL - None of the common ciphersuites is usable (eg, no suitable certificate, see debug messages)" );
 #endif /* POLARSSL_SSL_TLS_C */
 
 #if defined(POLARSSL_X509_USE_C) || defined(POLARSSL_X509_CREATE_C)