[0.4.11] [WIN32SS] Require at least the amount of extra memory, not exact amount

This fixes Civ II trying to create scrollbars based on 'native' scrollbars.
Fixes 2 application crashes CORE-15576 & CORE-13924

cherry picked from commit 0.4.12-dev-417-g
e022d8d

Author: learn-more

win32ss/user/ntuser/scrollbar.c

@@ -90,7 +90,7 @@ IntGetSBData(PWND pwnd, INT Bar)
        case SB_VERT:
          return &pSBInfo->Vert;
        case SB_CTL:
-         if ( pwnd->cbwndExtra != (sizeof(SBWND)-sizeof(WND)) )
+         if ( pwnd->cbwndExtra < (sizeof(SBWND)-sizeof(WND)) )
          {
             ERR("IntGetSBData Wrong Extra bytes for CTL Scrollbar!\n");
             return 0;

win32ss/user/user32/controls/scrollbar.c

@@ -100,7 +100,7 @@ IntGetSBData(PWND pwnd, INT Bar)
        case SB_VERT:
          return &pSBInfo->Vert;
        case SB_CTL:
-         if ( pwnd->cbwndExtra != (sizeof(SBWND)-sizeof(WND)) )
+         if ( pwnd->cbwndExtra < (sizeof(SBWND)-sizeof(WND)) )
          {
             ERR("IntGetSBData Wrong Extra bytes for CTL Scrollbar!\n");
             return 0;
@@ -1186,7 +1186,7 @@ ScrollBarWndProc_common(WNDPROC DefWindowProc, HWND Wnd, UINT Msg, WPARAM wParam
      if (!pWnd->fnid)
      {
         TRACE("ScrollBar CTL size %d\n", (sizeof(SBWND)-sizeof(WND)));
-        if ( pWnd->cbwndExtra != (sizeof(SBWND)-sizeof(WND)) )
+        if ( pWnd->cbwndExtra < (sizeof(SBWND)-sizeof(WND)) )
         {
            ERR("Wrong Extra bytes for Scrollbar!\n");
            return 0;