SDL_Core crashing during app registration (due to incorrect messaging I believe)

[jgrix]

Have a custom HMI implementation and I'm assuming I have some incorrect messaging. SDL Core functions with out issues when using the web based HMI.

**Messaging captured:**
{"id":110,"jsonrpc":"2.0","method":"VR.AddCommand","params":{"appID":1966668963,"cmdID":55,"grammarID":1094205203,"type":"Choice","vrCommands":["Muse"]}}
{"id":111,"jsonrpc":"2.0","method":"VR.AddCommand","params":{"appID":1966668963,"cmdID":56,"grammarID":1094205203,"type":"Choice","vrCommands":["Nile"]}}
{"id":112,"jsonrpc":"2.0","method":"VR.AddCommand","params":{"appID":1966668963,"cmdID":57,"grammarID":1094205203,"type":"Choice","vrCommands":["Nine Inch Nails"]}}
{"id":113,"jsonrpc":"2.0","method":"VR.AddCommand","params":{"appID":1966668963,"cmdID":58,"grammarID":1094205203,"type":"Choice","vrCommands":["Opeth"]}}
{"id":114,"jsonrpc":"2.0","method":"VR.AddCommand","params":{"appID":1966668963,"cmdID":59,"grammarID":1094205203,"type":"Choice","vrCommands":["A Perfect Circle"]}}
{"id":115,"jsonrpc":"2.0","method":"VR.AddC

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fff737fe700 (LWP 3670)]
0x000000000184ceaa in Json::Reader::currentValue (this=0x235fd98)
    at /home/gmix/REPO/SDLCoreCurrent/sdl_core/src/3rd_party-static/jsoncpp/src/lib_json/json_reader.cpp:794
794    return *(nodes_.top());

**Backtrace**
(gdb) backtrace
#0  0x000000000184ceaa in Json::Reader::currentValue (this=0x235fd98)
    at /home/gmix/REPO/SDLCoreCurrent/sdl_core/src/3rd_party-static/jsoncpp/src/lib_json/json_reader.cpp:794
#1  0x000000000184ad10 in Json::Reader::readValue (this=0x235fd98)
    at /home/gmix/REPO/SDLCoreCurrent/sdl_core/src/3rd_party-static/jsoncpp/src/lib_json/json_reader.cpp:210
#2  0x000000000184b8a8 in Json::Reader::readObject (this=0x235fd98)
    at /home/gmix/REPO/SDLCoreCurrent/sdl_core/src/3rd_party-static/jsoncpp/src/lib_json/json_reader.cpp:485
#3  0x000000000184ab7a in Json::Reader::readValue (this=0x235fd98)
    at /home/gmix/REPO/SDLCoreCurrent/sdl_core/src/3rd_party-static/jsoncpp/src/lib_json/json_reader.cpp:183
#4  0x000000000184a93c in Json::Reader::parse (this=0x235fd98, 
    beginDoc=0x7fff6c000938 "\360A", endDoc=0x7fff6c0016b2 "", root=..., 
    collectComments=true)
    at /home/gmix/REPO/SDLCoreCurrent/sdl_core/src/3rd_party-static/jsoncpp/src/lib_json/json_reader.cpp:144
#5  0x000000000184a7a9 in Json::Reader::parse (this=0x235fd98, document=..., 
    root=..., collectComments=true)
    at /home/gmix/REPO/SDLCoreCurrent/sdl_core/src/3rd_party-static/jsoncpp/src/lib_json/json_reader.cpp:101
#6  0x000000000182d72f in NsMessageBroker::CMessageBroker::onMessageReceived (
    this=0x20e99e8 <NsMessageBroker::CMessageBroker::getInstance()::instance>, 
---Type <return> to continue, or q <return> to quit---
    fd=17, aJSONData=...)
    at /home/gmix/REPO/SDLCoreCurrent/sdl_core/src/3rd_party-static/MessageBroker/src/lib_messagebroker/CMessageBroker.cpp:295
#7  0x00000000018398a1 in NsMessageBroker::TcpServer::Recv (this=0x2329ff0, 
    fd=17)
    at /home/gmix/REPO/SDLCoreCurrent/sdl_core/src/3rd_party-static/MessageBroker/src/server/mb_tcpserver.cpp:122
#8  0x000000000183a120 in NsMessageBroker::TcpServer::WaitMessage (
    this=0x2329ff0, ms=1000)
    at /home/gmix/REPO/SDLCoreCurrent/sdl_core/src/3rd_party-static/MessageBroker/src/server/mb_tcpserver.cpp:237
#9  0x000000000183a578 in NsMessageBroker::TcpServer::MethodForThread (
    this=0x2329ff0, arg=0x0)
    at /home/gmix/REPO/SDLCoreCurrent/sdl_core/src/3rd_party-static/MessageBroker/src/server/mb_tcpserver.cpp:312
#10 0x0000000001130731 in System::ThreadArgImpl<NsMessageBroker::TcpServer>::Call (this=0x2326ee0)
    at /home/gmix/REPO/SDLCoreCurrent/sdl_core/src/3rd_party-static/MessageBroker/include/system.h:96
#11 0x000000000183544d in System::Thread::Call (arg=0x235a1a0)
    at /home/gmix/REPO/SDLCoreCurrent/sdl_core/src/3rd_party-static/MessageBroker/src/lib_messagebroker/system.cpp:97
#12 0x00007ffff7576182 in start_thread (arg=0x7fff737fe700)
---Type <return> to continue, or q <return> to quit---
    at pthread_create.c:312
#13 0x00007ffff4cc547d in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111