wscript: fix build without DLLEMU

engine/wscript

@@ -67,9 +67,11 @@ def configure(conf):
 		conf.load('pthreads')
 		conf.check_pthread_flag()
 
+	if hasattr(conf.options, 'DLLEMU'):
+		conf.define_cond('XASH_DLL_LOADER', conf.options.DLLEMU)
+
 	conf.define_cond('XASH_STATIC_LIBS', conf.env.STATIC_LINKING)
 	conf.define_cond('XASH_CUSTOM_SWAP', conf.options.CUSTOM_SWAP)
-	conf.define_cond('XASH_DLL_LOADER', conf.options.DLLEMU)
 	conf.define_cond('SINGLE_BINARY', conf.env.SINGLE_BINARY)
 	conf.define_cond('XASH_NO_ASYNC_NS_RESOLVE', conf.options.NO_ASYNC_RESOLVE)
 	conf.define_cond('XASH_USE_SELECT', conf.options.USE_SELECT or conf.options.DEDICATED)