When we can't proceed because we don't have a display number, say so

Based on a patch taken from VcXsrv git on sourceforge which uses the
GPLv3 license

1 files changed, 3 insertions, 0 deletions

diff --git a/main.cc b/main.cc
index ceaaa84..0b739a6 100644
--- a/main.cc
+++ b/main.cc
@@ -109,7 +109,10 @@ class CMyWizard : public CWizard
                     }
                     // Check for valid input
                     if (config.display.empty())
+                      {
+			MessageBox(hwndDlg,"Please fill in a display number.","Error",MB_OK);
 			SetWindowLong(hwndDlg, DWL_MSGRESULT, -1);
+                      }
                     else
                         SetWindowLong(hwndDlg, DWL_MSGRESULT, IDD_CLIENTS);
 		    return TRUE;