Initialize variables before use it

[zimmerle]

bin_parm is not being initialized - https://github.com/SpiderLabs/ModSecurity/blob/d302b99ec539e64bc3d04295a5b9928aaa11b70f/src/utils/acmp.cc#L45

Original report by Marc Stern

[zimmerle]

fixed.

• 8dd4070
• d7b9726