fix borland error about string refernce

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@40597 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/button.cpp

@@ -849,11 +849,10 @@ bool wxButton::MSWOnDraw(WXDRAWITEMSTRUCT *wxdis)
     }
 
     COLORREF colFg = wxColourToRGB(GetForegroundColour());
-    DrawButtonText(hdc, &rectBtn,
+    if ( state & ODS_DISABLED ) colFg = GetSysColor(COLOR_GRAYTEXT) ;
-                   state & ODS_NOACCEL ? GetLabelText()
+    wxString label = GetLabel();
-                                       : GetLabel(),
+    if ( state & ODS_NOACCEL ) label = GetLabelText() ;
-                   state & ODS_DISABLED ? GetSysColor(COLOR_GRAYTEXT)
+    DrawButtonText(hdc, &rectBtn, label, colFg);
-                                        : colFg);
 
     return true;
 }