Revert "Revert "Add missing if idx < 0""

This reverts commit 64a9a01.

Author: bitterpanda63

aikido_zen/helpers/ip_matcher/__init__.py

@@ -27,6 +27,8 @@ def has(self, network):
         if not net or not net.is_valid():
             return False
         idx = binary_search_for_insertion_index(net, self.sorted)
+        if idx < 0:
+            return False
         if idx < len(self.sorted) and self.sorted[idx].contains(net):
             return True
         if idx - 1 >= 0 and self.sorted[idx - 1].contains(net):