Check return value of ssl_set_xxx() in programs
diff --git a/programs/ssl/ssl_mail_client.c b/programs/ssl/ssl_mail_client.c
index 455cca9..792e166 100644
--- a/programs/ssl/ssl_mail_client.c
+++ b/programs/ssl/ssl_mail_client.c
@@ -609,10 +609,18 @@
         ssl_set_ciphersuites( &ssl, opt.force_ciphersuite );
 
     ssl_set_ca_chain( &ssl, &cacert, NULL, opt.server_name );
-    ssl_set_own_cert( &ssl, &clicert, &pkey );
+    if( ( ret = ssl_set_own_cert( &ssl, &clicert, &pkey ) ) != 0 )
+    {
+        printf( " failed\n  ! ssl_set_own_cert returned %d\n\n", ret );
+        goto exit;
+    }
 
 #if defined(POLARSSL_SSL_SERVER_NAME_INDICATION)
-    ssl_set_hostname( &ssl, opt.server_name );
+    if( ( ret = ssl_set_hostname( &ssl, opt.server_name ) ) != 0 )
+    {
+        printf( " failed\n  ! ssl_set_hostname returned %d\n\n", ret );
+        goto exit;
+    }
 #endif
 
     if( opt.mode == MODE_SSL_TLS )