user32: Remove the no longer needed WIN_ISDIALOG flag.

dlls/user32/defdlg.c

@@ -342,7 +342,6 @@ DIALOGINFO *DIALOG_get_info( HWND hwnd, BOOL create )
         dlgInfo->idResult    = 0;
         dlgInfo->flags       = 0;
         wndPtr->dlgInfo = dlgInfo;
-        wndPtr->flags |= WIN_ISDIALOG;
     }
 
 out:

dlls/user32/dialog.c

@@ -1027,7 +1027,7 @@ static HWND DIALOG_FindMsgDestination( HWND hwndDlg )
         pParent = WIN_GetPtr(hParent);
         if (!pParent || pParent == WND_OTHER_PROCESS || pParent == WND_DESKTOP) break;
 
-        if (!(pParent->flags & WIN_ISDIALOG))
+        if (!pParent->dlgInfo)
         {
             WIN_ReleasePtr(pParent);
             break;
@@ -1135,7 +1135,7 @@ BOOL WINAPI IsDialogMessageW( HWND hwndDlg, LPMSG msg )
 
                 if (pWnd && pWnd != WND_OTHER_PROCESS)
                 {
-                    fIsDialog = (pWnd->flags & WIN_ISDIALOG) != 0;
+                    fIsDialog = (pWnd->dlgInfo != NULL);
                     WIN_ReleasePtr(pWnd);
                 }
 

dlls/user32/win.c

@@ -1986,7 +1986,7 @@ static LONG_PTR WIN_GetWindowLong( HWND hwnd, INT offset, UINT size, BOOL unicod
         retvalue = get_win_data( (char *)wndPtr->wExtra + offset, size );
 
         /* Special case for dialog window procedure */
-        if ((offset == DWLP_DLGPROC) && (size == sizeof(LONG_PTR)) && (wndPtr->flags & WIN_ISDIALOG))
+        if ((offset == DWLP_DLGPROC) && (size == sizeof(LONG_PTR)) && wndPtr->dlgInfo)
             retvalue = (LONG_PTR)WINPROC_GetProc( (WNDPROC)retvalue, unicode );
         WIN_ReleasePtr( wndPtr );
         return retvalue;
@@ -2115,7 +2115,7 @@ LONG_PTR WIN_SetWindowLong( HWND hwnd, INT offset, UINT size, LONG_PTR newval, B
         break;
     case DWLP_DLGPROC:
         if ((wndPtr->cbWndExtra - sizeof(LONG_PTR) >= DWLP_DLGPROC) &&
-            (size == sizeof(LONG_PTR)) && (wndPtr->flags & WIN_ISDIALOG))
+            (size == sizeof(LONG_PTR)) && wndPtr->dlgInfo)
         {
             WNDPROC *ptr = (WNDPROC *)((char *)wndPtr->wExtra + DWLP_DLGPROC);
             retval = (ULONG_PTR)WINPROC_GetProc( *ptr, unicode );

dlls/user32/win.h

@@ -70,9 +70,8 @@ typedef struct tagWND
 #define WIN_NEED_SIZE             0x0002 /* Internal WM_SIZE is needed */
 #define WIN_NCACTIVATED           0x0004 /* last WM_NCACTIVATE was positive */
 #define WIN_ISMDICLIENT           0x0008 /* Window is an MDIClient */
-#define WIN_ISDIALOG              0x0010 /* Window is a dialog */
-#define WIN_ISUNICODE             0x0040 /* Window is Unicode */
-#define WIN_NEEDS_SHOW_OWNEDPOPUP 0x0080 /* WM_SHOWWINDOW:SC_SHOW must be sent in the next ShowOwnedPopup call */
+#define WIN_ISUNICODE             0x0010 /* Window is Unicode */
+#define WIN_NEEDS_SHOW_OWNEDPOPUP 0x0020 /* WM_SHOWWINDOW:SC_SHOW must be sent in the next ShowOwnedPopup call */
 
   /* Window functions */
 extern HWND get_hwnd_message_parent(void) DECLSPEC_HIDDEN;