Fix change directory, which createing relative symlink

pym/cl_template.py

@@ -4236,6 +4236,8 @@ re.M|re.S)
                                     "%s -> %s"%(prevOldFile, pathOldFile))
                 return ([], False)
             if not objHeadNew.body.strip():
+                if pathProg:
+                    os.chdir(pathProg)
                 return ([], False)
         else:
             applyFiles = [pathOldFile]