Return value of sccp_rtp_get_sampleRate, is larger than uint8_t, changed to returning int

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@5363 43c1dc8c-776e-4df2-8ef1-6e829299be21
When using Variable sized array's, you cannot use sizeof to get the length of the array, you should use the length specified during array creation instead. Remarked out non-used function sockaddr_cmp_addr in sccp_utils.c

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@5364 43c1dc8c-776e-4df2-8ef1-6e829299be21