[sr-dev] [kamailio/kamailio] cfg_rpc updates changing variable values to large random numbers (#1583)

[vinesinha]

Kamailio version - 4.4
Compiled by source code 

uname -a (IP obfuscated)
Linux ip-XXXXXXXXXX 4.4.23-31.54.amzn1.x86_64 #1 SMP Tue Oct 18 22:02:09 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

In the code that I have for cfg_block_t

```
/*! \brief single memoy block that contains all the cfg values */
typedef struct _cfg_block {
	atomic_t	refcnt;		/*!< reference counter,
					the block is automatically deleted
					when it reaches 0 */
	unsigned char	vars[1];	/*!< blob that contains the values */
} cfg_block_t;
```

There's no padding to force the 8 byte alignment. 
Could that be the reason for it to fail ?

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