Fixed broken Dequeue() stopping condition

The CRingBuffer::Dequeue() function did not respect the nMaxCount
parameter, leading to buffer overflow/memory corruption.

include/ringbuffer.h

@@ -87,7 +87,7 @@ public:
 		size_t nDequeued = 0;
 		m_Lock.Acquire();
 
-		while (m_nInPtr != m_nOutPtr)
+		while (m_nInPtr != m_nOutPtr && nDequeued < nMaxCount)
 		{
 			pOutBuffer[nDequeued++] = m_Data[m_nOutPtr++];
 			m_nOutPtr &= BufferMask;