fixed an issue where the CPU sometimes single-steps an extra time after pausing

Source/Core/Common/Src/Thread.h

@@ -72,6 +72,13 @@ public:
 		is_set = false;
 	}
 
+	void Reset()
+	{
+		std::unique_lock<std::mutex> lk(m_mutex);
+		// no other action required, since wait loops on the predicate and any lingering signal will get cleared on the first iteration
+		is_set = false;
+	}
+
 private:
 	class IsSet
 	{

Source/Core/Core/Src/HW/CPU.cpp

@@ -115,6 +115,7 @@ void CCPU::EnableStepping(const bool _bStepping)
 	if (_bStepping)
 	{
 		PowerPC::Pause();
+		m_StepEvent.Reset();
 		g_video_backend->EmuStateChange(EMUSTATE_CHANGE_PAUSE);
 		DSP::GetDSPEmulator()->DSP_ClearAudioBuffer(true);
 	}