Check to force tools to initialize the ctx id to zero. (#1135)

* Check to force tool to initialize the ctx id to zero.

* initialize rocprofiler_context_id_t with 0 in units tests

* changelog

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Co-authored-by: Gopesh Bhardwaj <gopesh.bhardwaj@amd.com>

samples/advanced_thread_trace/client.cpp

@@ -111,7 +111,7 @@ using CodeobjAddressTranslate = rocprofiler::sdk::codeobj::disassembly::CodeobjA
 using SymbolInfo              = rocprofiler::sdk::codeobj::disassembly::SymbolInfo;
 
 rocprofiler_client_id_t* client_id  = nullptr;
-rocprofiler_context_id_t client_ctx = {};
+rocprofiler_context_id_t client_ctx = {0};
 
 struct isa_map_elem_t
 {