Emscripted SDL Funcs Patch

--- emscripten-stable/src/library_sdl.js    2011-12-29 15:18:57.000000000 -0500
+++ emscripten/src/library_sdl.js   2012-01-28 20:57:30.000000000 -0500
@@ -427,7 +431,20 @@
   SDL_GetTicks: function() {
     return Math.floor(Date.now() - SDL.startTime);
   },
-
+  // Start alberthrocks' code!
+  SDL_AddTimer: function(interval, callback, param) {
+    return setInterval(callback, interval, param); // Not sure if I did this right...
+  },
+  SDL_RemoveTimer: function(id) {
+    return clearInterval(id);
+  },
+  // DIRTY HACK - SHOULD FIX WHEN SurfaceFormat AND THE LIKES ARE DONE!
+  SDL_DisplayFormat: function(surf) {
+    var flags;
+    flags |= 1; // SDL_HWSURFACE - this tells SDL_MUSTLOCK that this needs to be locked
+    return SDL.makeSurface(SDL.surfaces[surf].width, SDL.surfaces[surf].height, flags);
+  },
+  // End alberthrocks' code!
   SDL_PollEvent: function(ptr) {
     if (SDL.events.length === 0) return 0;
     if (ptr) {
@@ -506,7 +523,7 @@
       SDL.audio.pushAudio = function(ptr, size) {
         var mozBuffer = SDL.audio.mozBuffer;
         for (var i = 0; i < totalSamples; i++) {
-          mozBuffer[i] = ({{{ makeGetValue('ptr', 'i*2', 'i16', 0, 1) }}} / 65536)-1; // hardcoded 16-bit audio
+          mozBuffer[i] = ({{{ makeGetValue('ptr', 'i*2', 'i16', 0, 0) }}}) / 0x8000; // hardcoded 16-bit audio, signed (TODO: reSign if not ta2?)
         }
         SDL.audio.mozOutput['mozWriteAudio'](mozBuffer);
       }