Win32: more dialogs when submitting the bug reports

Close #4798
(cherry picked from commit f84dd14d1d66bef0b82acf65a5808e50e7801445)
(cherry picked from commit 30b2de492e4e0922fe069682cb94ae5eaa9d55c1)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

bin/winvlc.c

@@ -249,13 +249,30 @@ static void check_crashdump()
                     swprintf( remote_file, L"/crashes-win32/%04d%02d%02d%02d%02d%02d",
                             now.wYear, now.wMonth, now.wDay, now.wHour, now.wMinute, now.wSecond );
 
-                    FtpPutFile( ftp, wdir, remote_file, FTP_TRANSFER_TYPE_BINARY, 0);
+                    if( FtpPutFile( ftp, wdir, remote_file, FTP_TRANSFER_TYPE_BINARY, 0) )
+                        MessageBox( NULL, L"Report sent correctly. Thanks a lot for the help.",
+                                    L"Report sent", MB_OK);
+                    else
+                        MessageBox( NULL, L"There was an error while transferring to the FTP server. "\
+                                    "Thanks a lot for the help anyway.",
+                                    L"Report sending failed", MB_OK);
                     InternetCloseHandle(ftp);
                 }
                 else
+                {
+                    MessageBox( NULL, L"There was an error while connecting to the FTP server. "\
+                                    "Thanks a lot for the help anyway.",
+                                    L"Report sending failed", MB_OK);
                     fprintf(stderr,"Can't connect to FTP server%d\n",GetLastError());
+                }
                 InternetCloseHandle(Hint);
             }
+            else
+            {
+                  MessageBox( NULL, L"There was an error while connecting to Internet. "\
+                                    "Thanks a lot for the help anyway.",
+                                    L"Reporting sending failed", MB_OK);
+            }
         }
 
         _wremove(wdir);