Fix Codelite generation of empty source tree project.

modules/codelite/codelite_project.lua

@@ -116,6 +116,11 @@
 
 	function m.files(prj)
 		local tr = project.getsourcetree(prj)
+		if #tr.children == 0 then
+			-- handle project without files
+			_p(1, '<VirtualDirectory Name="%s"/>', tr.name)
+			return
+		end
 		tree.traverse(tr, {
 			-- folders are handled at the internal nodes
 			onbranchenter = function(node, depth)

modules/codelite/tests/test_codelite_project.lua

@@ -100,3 +100,11 @@
     </GlobalSettings>
 		]]
 	end
+
+	function suite.OnProject_EmptySourceFiles()
+		prepare()
+		codelite.project.files(prj)
+		test.capture [[
+  <VirtualDirectory Name="MyProject"/>
+		]]
+	end