util-host-os-info: scan-build fix

util-host-os-info: scan-build fix

util-host-os-info.c:202:13: warning: Potential leak of memory pointed to by 'user_data'
            SCLogError(SC_ERR_INVALID_IPV6_ADDR, "Invalid IPV6 address inside");
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./util-debug.h:278:35: note: expanded from macro 'SCLogError'
 #define SCLogError(err_code, ...) SCLogErr(SC_LOG_ERROR, err_code, \
                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./util-debug.h:214:82: note: expanded from macro 'SCLogErr'
                                  char _sc_log_err_msg[SC_LOG_MAX_LOG_MSG_LEN] = ""; \
                                                                                 ^~
1 warning generated.