Setting the background color for label controls in IO fixed

git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@2081 212acab6-be3b-0410-9dea-997c60f758d6

Contrib/InstallOptions/InstallerOptions.cpp

@@ -725,6 +725,7 @@ BOOL CALLBACK cfgDlgProc(HWND   hwndDlg,
     break;
     case WM_CTLCOLORSTATIC:
     case WM_CTLCOLORDLG:
+      SetBkMode((HDC)wParam, TRANSPARENT);
       return (BOOL)GetWindowLong((HWND)lParam, GWL_USERDATA);
   }
 	return 0;