cut if history range asked is bigger than history length

	when calling a magic with a range (eg %save filename 1-500) and an history
	smaller than 500
	IPython.core.HistoryManager/_get_range_session
	would crash

IPython/core/history.py

@@ -303,7 +303,7 b' class HistoryManager(Configurable):'
         n = len(input_hist)
         if start < 0:
             start += n
-        if not stop:
+        if not stop or (stop > n):
             stop = n
         elif stop < 0:
             stop += n