Fixed accidental reference being taken on new static const variable with g++ (issue #208)

Author: cameron314

blockingconcurrentqueue.h

@@ -56,7 +56,7 @@ class BlockingConcurrentQueue
 	// includes making the memory effects of construction visible, possibly with a
 	// memory barrier).
 	explicit BlockingConcurrentQueue(size_t capacity = 6 * BLOCK_SIZE)
-		: inner(capacity), sema(create<LightweightSemaphore>(0, Traits::MAX_SEMA_SPINS), &BlockingConcurrentQueue::template destroy<LightweightSemaphore>)
+		: inner(capacity), sema(create<LightweightSemaphore>(0, (int)Traits::MAX_SEMA_SPINS), &BlockingConcurrentQueue::template destroy<LightweightSemaphore>)
 	{
 		assert(reinterpret_cast<ConcurrentQueue*>((BlockingConcurrentQueue*)1) == &((BlockingConcurrentQueue*)1)->inner && "BlockingConcurrentQueue must have ConcurrentQueue as its first member");
 		if (!sema) {
@@ -65,7 +65,7 @@ class BlockingConcurrentQueue
 	}
 
 	BlockingConcurrentQueue(size_t minCapacity, size_t maxExplicitProducers, size_t maxImplicitProducers)
-		: inner(minCapacity, maxExplicitProducers, maxImplicitProducers), sema(create<LightweightSemaphore>(0, Traits::MAX_SEMA_SPINS), &BlockingConcurrentQueue::template destroy<LightweightSemaphore>)
+		: inner(minCapacity, maxExplicitProducers, maxImplicitProducers), sema(create<LightweightSemaphore>(0, (int)Traits::MAX_SEMA_SPINS), &BlockingConcurrentQueue::template destroy<LightweightSemaphore>)
 	{
 		assert(reinterpret_cast<ConcurrentQueue*>((BlockingConcurrentQueue*)1) == &((BlockingConcurrentQueue*)1)->inner && "BlockingConcurrentQueue must have ConcurrentQueue as its first member");
 		if (!sema) {