BoostSet: Add 'remove' and rename BoostHash::erase to remove

This is more consistent with Qt's method naming.

src/boost-hash.h

@@ -53,7 +53,7 @@ public:
 		p.insert(PairType(key, value));
 	}
 
-	inline void erase(const K &key)
+	inline void remove(const K &key)
 	{
 		p.erase(key);
 	}
@@ -116,6 +116,11 @@ public:
 		p.insert(key);
 	}
 
+	inline void remove(const K &key)
+	{
+		p.erase(key);
+	}
+
 	inline const_iterator cbegin() const
 	{
 		return p.cbegin();

src/soundemitter.cpp

@@ -233,7 +233,7 @@ SoundBuffer *SoundEmitter::allocateBuffer(const std::string &filename)
 		while (wouldBeBytes > SE_CACHE_MEM && !buffers.isEmpty())
 		{
 			SoundBuffer *last = buffers.tail();
-			bufferHash.erase(last->key);
+			bufferHash.remove(last->key);
 			buffers.remove(last->link);
 
 			wouldBeBytes -= last->bytes;