scons/SConstruct: fix a SCons warning

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@26329 a592a061-630c-0410-9148-cb99ea01b6c8

diff --git a/development/scons/SConstruct b/development/scons/SConstruct
index b51b4e5427e0944e4e27c9d34ed9ee5ee27ae432..13c1867b7f49ef4fe285882fe4de21a99d7a9509 100644 (file)
--- a/development/scons/SConstruct
+++ b/development/scons/SConstruct
@@ -1288,7 +1288,7 @@ if platform_name == 'cygwin':
 # to be built with all the include directories etc
 #
 if frontend == 'qt4':
-    frontend_env = env.Copy()
+    frontend_env = env.Clone()
     frontend_env['BUILDERS']['qtResource'] = Builder(action = utils.env_qtResource)
 
     # handle qt related user specified paths