[PATCH 1/1] winex11.drv: Allow MWM_FUNC_MAXIMIZE when WS_MAXIMIZE is present.

[Zhiyi Zhang]

From: Zhiyi Zhang

Mutter refuses to maximize a window when MWM_FUNC_MAXIMIZE is not present. However,
ShowWindow(SW_MAXIMIZE) on Windows can maximize the window, even without WS_MAXIMIZEBOX.
This is similar to 688fe706.

Fix Tidy Cauldron (2708320), a Unity game, unable to maximize in some cases.
---
 dlls/winex11.drv/window.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/dlls/winex11.drv/window.c b/dlls/winex11.drv/window.c
index 52d0e32ad55..615fb9da086 100644
--- a/dlls/winex11.drv/window.c
+++ b/dlls/winex11.drv/window.c
@@ -913,6 +913,9 @@ static void set_mwm_hints( struct x11drv_win_data *data, UINT style, UINT ex_sty
             /* The window can be programmatically minimized even without
                a minimize box button. Allow the WM to restore it. */
             if (style & WS_MINIMIZE)    mwm_hints.functions |= MWM_FUNC_MINIMIZE | MWM_FUNC_MAXIMIZE;
+            /* The window can be programmatically maximized even without
+               a maximize box button. Allow the WM to maximize it. */
+            if (style & WS_MAXIMIZE)    mwm_hints.functions |= MWM_FUNC_MAXIMIZE;
         }
     }