Possible leak of the `devices` buffer in `doInquire()` on every inquiry

[OvOhao]

Possible leak of the devices buffer in doInquire() on every inquiry

I found a possible native memory leak in doInquire(). It allocates the devices
array with malloc and returns it by value, but neither caller ever frees it.

File: src/linux/DeviceINQ.cc

Function: DeviceINQ::doInquire (consumed by DeviceINQ::InquireSync and
InquireWorker::HandleOKCallback)

inquiryResult.devices = (bt_device*)malloc(num_rsp * sizeof(bt_device));
...
free( ii );            // the ii buffer is freed
close( sock );
return inquiryResult;  // inquiryResult.devices is never freed

doInquire() returns inquiryResult by value with a heap devices array. Both callers
read inquiryResult.devices[i] in a loop and then discard the struct without ever
calling free(inquiryResult.devices). Every device scan (inquire() / inquireSync())
leaks the whole array (num_rsp * sizeof(bt_device)). The adjacent ii buffer is
freed, which makes the omission clear.

Suggested fix: free(inquiryResult.devices) in both callers after they finish consuming
it (or have doInquire return ownership through a type that frees it).