[USER32][NTUSER] Fix wrong return from LB_GETLISTBOXINFO (reactos#2168)

And is now consistent with comctl32 and Wine too...

Author: zecarlos1957

win32ss/user/ntuser/window.c

@@ -3349,10 +3349,7 @@ NtUserGetListBoxInfo(
    {
       LB_DESCR *descr = ((PWND2LB)Wnd)->pLBiv;
       // See Controls ListBox.c:LB_GETLISTBOXINFO must match...
-      if (descr->style & LBS_MULTICOLUMN) //// ReactOS
-         Ret = descr->page_size * descr->column_width;
-      else
-         Ret = descr->page_size;
+      Ret = descr->page_size;
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {

win32ss/user/user32/controls/listbox.c

@@ -3055,10 +3055,7 @@ LRESULT WINAPI ListBoxWndProc_common( HWND hwnd, UINT msg,
         return LB_OKAY;
 
     case LB_GETLISTBOXINFO:
-        if (descr->style & LBS_MULTICOLUMN) //// ReactOS
-           return descr->page_size * descr->column_width;
-        else
-           return descr->page_size;
+        return descr->page_size;
 
     case WM_DESTROY:
         return LISTBOX_Destroy( descr );