[sr-dev] [kamailio/kamailio] cnxcc: minor changes (#2343)

[lgtm-com[bot]]

This pull request **introduces 5 alerts** when merging aa2f42d2a1d3a8a87c925deef570dfa38cc1915f into 2d58abdc01372898f61d2c09190fdce2681eb738 - [view on LGTM.com](https://lgtm.com/projects/g/kamailio/kamailio/rev/pr-1901d8914cdf455316a676936365e093765f8d17)

**new alerts:**

* 3 for Local variable hides global variable
* 1 for Use of potentially dangerous function
* 1 for Ambiguously signed bit\-field member

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