Fixed bug 2374 - Update copyright for 2014...

Is it that time already??

premake/projects/mixer.lua

@@ -1,4 +1,4 @@
--- Copyright (C) 1997-2011 Sam Lantinga <slouken@libsdl.org>
+-- Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
 --
 -- This software is provided 'as-is', without any express or implied
 -- warranty.  In no event will the authors be held liable for any damages
@@ -27,4 +27,4 @@ SDL_project "mixer"
 	SDL_projectDependencies { "SDL2" }
 	SDL_files { "/src/common.*", "/src/mixer.*", "/Info.plist",
 		"/data/drums/ds_kick_big_amb.wav", "/data/drums/ds_brush_snare.wav",
-		"/data/drums/ds_loose_skin_mute.wav", "/data/drums/ds_china.wav" }
+		"/data/drums/ds_loose_skin_mute.wav", "/data/drums/ds_china.wav" }