PE: fix potential bug in pe_print

app/pe/pe_affichage.py

@@ -27,7 +27,7 @@ def pe_print(*a, **cles):
         msg = " ".join(a)
         print(msg)
     else:
-        lines = getattr(g, "scodoc_pe_log")
+        lines = getattr(g, "scodoc_pe_log", None)
         if lines is None:
             lines = pe_start_log()
         msg = " ".join(a)