[C++] Check for thread being joinable rather that m_isRunning. Issue #844.
[C++] Check for thread being joinable rather that m_isRunning. Issue #844.

real-logic/Aeron,EvilMcJerkface/Aeron,mikeb01/Aeron,real-logic/Aeron,EvilMcJerkface/Aeron,real-logic/Aeron,mikeb01/Aeron,EvilMcJerkface/Aeron,real-logic/Aeron,mikeb01/Aeron,mikeb01/Aeron,EvilMcJerkface/Aeron