Fix missing null check

Coverity discovered a missing null check for the variable `val`. Fix
 that by adding the appropriate checks for it.

Closes redmine ticket #2676

diff --git a/suricata/update/rule.py b/suricata/update/rule.py
index a400e3f03a199e8dafd32e3da047be3fbe738f79..8474b68014800c4de8d4160735382e952bed513b 100644 (file)
--- a/suricata/update/rule.py
+++ b/suricata/update/rule.py
@@ -310,7 +310,7 @@ def parse(buf, group=None):
         elif name == "reference":
             rule.references.append(val)
         elif name == "msg":
-            if val.startswith('"') and val.endswith('"'):
+            if val and val.startswith('"') and val.endswith('"'):
                 val = val[1:-1]
             rule[name] = val
         else: