Fixed some minor compiler warnings

src/modules/sound/Decoder.h

@@ -67,7 +67,7 @@ public:
 	/**
 	 * Destructor. Should free internal buffer.
 	 **/
-	virtual ~Decoder() {};
+	virtual ~Decoder() {}
 
 	/**
 	 * Decodes the next chunk of the music stream, this will usually be

src/modules/sound/lullaby/FLACDecoder.cpp

@@ -183,4 +183,4 @@ void FLACDecoder::error_callback(FLAC__StreamDecoderErrorStatus status)
 } // sound
 } // love
 
-#endif // 0
+#endif // 0

src/modules/sound/lullaby/GmeDecoder.cpp

@@ -146,4 +146,4 @@ int GmeDecoder::getBitDepth() const
 } // sound
 } // love
 
-#endif // LOVE_SUPPORT_GME
+#endif // LOVE_SUPPORT_GME