Added patch to preserve beginning of extra data for MDI windows.

patches/patchinstall.sh

@@ -311,6 +311,7 @@ patch_enable_all ()
 	enable_user32_GetSystemMetrics="$1"
 	enable_user32_Invalidate_Key_State="$1"
 	enable_user32_ListBox_Size="$1"
+	enable_user32_MDI_Extra_Data="$1"
 	enable_user32_Mouse_Message_Hwnd="$1"
 	enable_user32_Refresh_MDI_Menus="$1"
 	enable_user32_ScrollWindowEx="$1"
@@ -1079,6 +1080,9 @@ patch_enable ()
 		user32-ListBox_Size)
 			enable_user32_ListBox_Size="$2"
 			;;
+		user32-MDI_Extra_Data)
+			enable_user32_MDI_Extra_Data="$2"
+			;;
 		user32-Mouse_Message_Hwnd)
 			enable_user32_Mouse_Message_Hwnd="$2"
 			;;
@@ -6322,6 +6326,21 @@ if test "$enable_user32_ListBox_Size" -eq 1; then
 	) >> "$patchlist"
 fi
 
+# Patchset user32-MDI_Extra_Data
+# |
+# | This patchset fixes the following Wine bugs:
+# |   *	[#15473] Preserve beginning of extra data for MDI windows
+# |
+# | Modified files:
+# |   *	dlls/user32/mdi.c, dlls/user32/tests/msg.c
+# |
+if test "$enable_user32_MDI_Extra_Data" -eq 1; then
+	patch_apply user32-MDI_Extra_Data/0001-user32-Preserve-beginning-of-extra-data-for-MDI-wind.patch
+	(
+		echo '+    { "Michael Müller", "user32: Preserve beginning of extra data for MDI windows.", 1 },';
+	) >> "$patchlist"
+fi
+
 # Patchset user32-Mouse_Message_Hwnd
 # |
 # | This patchset fixes the following Wine bugs:

patches/user32-MDI_Extra_Data/0001-user32-Preserve-beginning-of-extra-data-for-MDI-wind.patch

@@ -0,0 +1,57 @@
+From fe8f3aa132c6fed2d663a95f9f5c8d3626a6693a Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Michael=20M=C3=BCller?= <michael@fds-team.de>
+Date: Sun, 14 Feb 2016 04:49:46 +0100
+Subject: user32: Preserve beginning of extra data for MDI windows.
+
+---
+ dlls/user32/mdi.c       | 1 +
+ dlls/user32/tests/msg.c | 6 +++++-
+ 2 files changed, 6 insertions(+), 1 deletion(-)
+
+diff --git a/dlls/user32/mdi.c b/dlls/user32/mdi.c
+index b5a0473..62023a7 100644
+--- a/dlls/user32/mdi.c
++++ b/dlls/user32/mdi.c
+@@ -127,6 +127,7 @@ typedef struct
+      * states it must keep coherency with USER32 on its own. This is true for
+      * Windows as well.
+      */
++    LRESULT   reserved;
+     UINT      nActiveChildren;
+     HWND      hwndChildMaximized;
+     HWND      hwndActiveChild;
+diff --git a/dlls/user32/tests/msg.c b/dlls/user32/tests/msg.c
+index d15a8e7..eeb887b 100644
+--- a/dlls/user32/tests/msg.c
++++ b/dlls/user32/tests/msg.c
+@@ -3380,6 +3380,7 @@ static void test_mdi_messages(void)
+     BOOL zoomed;
+     RECT rc;
+     HMENU hMenu = CreateMenu();
++    DWORD val;
+ 
+     if (!mdi_RegisterWindowClasses()) assert(0);
+ 
+@@ -3408,8 +3409,9 @@ static void test_mdi_messages(void)
+                                  rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top,
+                                  mdi_frame, 0, GetModuleHandleA(0), &client_cs);
+     assert(mdi_client);
+-    ok_sequence(WmCreateMDIclientSeq, "Create visible MDI client window", FALSE);
++    SetWindowLongA(mdi_client, 0, 0xdeadbeef);
+ 
++    ok_sequence(WmCreateMDIclientSeq, "Create visible MDI client window", FALSE);
+     ok(GetActiveWindow() == mdi_frame, "wrong active window %p\n", GetActiveWindow());
+     ok(GetFocus() == mdi_frame, "input focus should be on MDI frame not on %p\n", GetFocus());
+ 
+@@ -3867,6 +3869,8 @@ static void test_mdi_messages(void)
+     SetFocus(0);
+     flush_sequence();
+ 
++    val = GetWindowLongA(mdi_client, 0);
++    ok(val == 0xdeadbeef || broken(val == 0) /* >= Win 2003 */, "Expected 0xdeadbeef, got 0x%x\n", val);
+     DestroyWindow(mdi_client);
+     ok_sequence(WmDestroyMDIclientSeq, "Destroy MDI client window", FALSE);
+ 
+-- 
+2.7.1
+

patches/user32-MDI_Extra_Data/definition

@@ -0,0 +1 @@
+Fixes: [15473] Preserve beginning of extra data for MDI windows