- added directx include path to VS2008 solution

- updated shape vcproj and add it to VS2008 solution
- minor changes (i.e. typecasting) to get rid of compiler warnings in VS

src/audio/SDL_audio.c

@@ -339,7 +339,7 @@ SDL_RunAudio(void *devicep)
 
     /* For streaming when the buffer sizes don't match up */
     Uint8 *istream;
-    int istream_len;
+    int istream_len = 0;
 
     /* Perform any thread setup */
     device->threadid = SDL_ThreadID();