server: Make wparam and lparam values unsigned long for win64 compatability.
diff --git a/server/sock.c b/server/sock.c
index 109e3bc..ce63932 100644
--- a/server/sock.c
+++ b/server/sock.c
@@ -276,7 +276,7 @@
             if (sock->pmask & (1 << event))
             {
                 unsigned int lparam = (1 << event) | (sock->errors[event] << 16);
-                post_message( sock->window, sock->message, (unsigned int)sock->wparam, lparam );
+                post_message( sock->window, sock->message, (unsigned long)sock->wparam, lparam );
             }
         }
         sock->pmask = 0;