commit c70a091fa3bfbaa4e28d456a3dac7214217aa206
Author:     ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
AuthorDate: Wed Nov 25 08:29:25 2020 +0100
Commit:     ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
CommitDate: Wed Nov 25 08:29:47 2020 +0100

    Match format specifier and variable type.

 test/demo.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git test/demo.cxx test/demo.cxx
index d766e65..14c86fc 100644
--- test/demo.cxx
+++ test/demo.cxx
@@ -415,7 +415,7 @@ void dobut(Fl_Widget *, long arg) {
                             NULL, &suInfo, &prInfo);
   if (!stat) {
     DWORD err = GetLastError();
-    fl_alert("Error starting process, error #%d\n'%s'", err, command);
+    fl_alert("Error starting process, error #%lu\n'%s'", err, command);
   }
 
 #elif defined __APPLE__