[PVR] Fix stack overflow while trying to get play resume point from PVR client

[ksooo]

This is a bugfix followup to #11115.

There was a crash caused by a stack overflow reported in the forum: http://forum.kodi.tv/showthread.php?tid=298461&pid=2481973#pid2481973

Interesting part of the user supplied crash log:

...
#2892 0x007cb5ec in PVR::CPVRRecording::GetResumePoint() const ()
#2893 0x00710cf0 in PVR::CPVRClient::WriteClientRecordingInfo(PVR::CPVRRecording const&, PVR_RECORDING&) ()
#2894 0x00711010 in PVR::CPVRClient::GetRecordingLastPlayedPosition(PVR::CPVRRecording const&) ()
#2895 0x007ee1d4 in PVR::CPVRClients::GetRecordingLastPlayedPosition(PVR::CPVRRecording const&) ()
#2896 0x007cb5ec in PVR::CPVRRecording::GetResumePoint() const ()
#2897 0x00710cf0 in PVR::CPVRClient::WriteClientRecordingInfo(PVR::CPVRRecording const&, PVR_RECORDING&) ()
#2898 0x00711010 in PVR::CPVRClient::GetRecordingLastPlayedPosition(PVR::CPVRRecording const&) ()
#2899 0x007ee1d4 in PVR::CPVRClients::GetRecordingLastPlayedPosition(PVR::CPVRRecording const&) ()
#2900 0x007cb5ec in PVR::CPVRRecording::GetResumePoint() const ()
#2901 0x00710cf0 in PVR::CPVRClient::WriteClientRecordingInfo(PVR::CPVRRecording const&, PVR_RECORDING&) ()
#2902 0x00711010 in PVR::CPVRClient::GetRecordingLastPlayedPosition(PVR::CPVRRecording const&) ()
#2903 0x007ee1d4 in PVR::CPVRClients::GetRecordingLastPlayedPosition(PVR::CPVRRecording const&) ()
#2904 0x007cb5ec in PVR::CPVRRecording::GetResumePoint() const ()
#2905 0x00710cf0 in PVR::CPVRClient::WriteClientRecordingInfo(PVR::CPVRRecording const&, PVR_RECORDING&) ()
#2906 0x00711010 in PVR::CPVRClient::GetRecordingLastPlayedPosition(PVR::CPVRRecording const&) ()
#2907 0x007ee1d4 in PVR::CPVRClients::GetRecordingLastPlayedPosition(PVR::CPVRRecording const&) ()
#2908 0x007cb5ec in PVR::CPVRRecording::GetResumePoint() const ()
#2909 0x00710cf0 in PVR::CPVRClient::WriteClientRecordingInfo(PVR::CPVRRecording const&, PVR_RECORDING&) ()
#2910 0x00711010 in PVR::CPVRClient::GetRecordingLastPlayedPosition(PVR::CPVRRecording const&) ()
#2911 0x007ee1d4 in PVR::CPVRClients::GetRecordingLastPlayedPosition(PVR::CPVRRecording const&) ()
#2912 0x007cb5ec in PVR::CPVRRecording::GetResumePoint() const ()
#2913 0x00710cf0 in PVR::CPVRClient::WriteClientRecordingInfo(PVR::CPVRRecording const&, PVR_RECORDING&) ()
#2914 0x00710fa0 in PVR::CPVRClient::SetRecordingLastPlayedPosition(PVR::CPVRRecording const&, int) ()
#2915 0x007ee12c in PVR::CPVRClients::SetRecordingLastPlayedPosition(PVR::CPVRRecording const&, int, PVR_ERROR*) ()
#2916 0x007cb380 in PVR::CPVRRecording::SetResumePoint(CBookmark const&) ()
#2917 0x00579188 in CVideoInfoTag::SetResumePoint(double, double, std::string const&) ()
#2918 0x007cbe28 in PVR::CPVRRecording::CPVRRecording(PVR_RECORDING const&, unsigned int) ()
#2919 0x006d42a0 in KodiAPI::PVR::CAddonCallbacksPVR::PVRTransferRecordingEntry(void*, ADDON_HANDLE_STRUCT*, PVR_RECORDING const*) ()
#2920 0x6b775fd4 in cPVRClientMediaPortal::GetRecordings(ADDON_HANDLE_STRUCT*) () from /usr/lib/kodi/addons/pvr.mediaportal.tvserver/pvr.mediaportal.tvserver.so.3.0.2
#2921 0x0070ff18 in PVR::CPVRClient::GetRecordings(PVR::CPVRRecordings*, bool) ()
#2922 0x007f0524 in PVR::CPVRClients::GetRecordings(PVR::CPVRRecordings*, bool) ()
#2923 0x007ccb84 in PVR::CPVRRecordings::UpdateFromClients() ()
#2924 0x007cc52c in PVR::CPVRRecordings::Update() ()
#2925 0x007cc5b4 in PVR::CPVRRecordings::Load() ()
#2926 0x007f6604 in PVR::CPVRManager::Load(bool) ()
#2927 0x007f86a0 in PVR::CPVRManager::Process() ()
#2928 0x005f36ec in CThread::Action() ()
#2929 0x005f3dd0 in CThread::staticThread(void*) ()
#2930 0x76efaf40 in start_thread (arg=0x5b88d3a0) at pthread_create.c:335
#2931 0x75339e18 in ?? () at ../sysdeps/unix/sysv/linux/arm/clone.S:86 from /usr/lib/libc.so.6

@Jalle19 mind doing the review.
@MilhouseVH could you please include this PR into your build and ask 'bmonster' whether this fixes his issue?

[Jalle19]

Let's wait for the reporter to report back

[ksooo]

Fix has been confirmed by the problem reporter.

[ksooo]

jenkins build this please