add generic dispatcher headers for frontend etc

add generic audio, video and demux headers in zapit/include (TODO: put them
into a better place, or put wrappers into lib directories) that automatically
dispatch to the hardware specific functions and use them in the code

git-svn-id: file:///home/bas/coolstream_public_svn/THIRDPARTY/applications/neutrino-experimental@962 e54a6e83-5905-42d5-8d5c-058d10e6a962

src/driver/pictureviewer/fb_display.cpp

@@ -2,6 +2,7 @@
  * (c) smoku/2000 
  */
 
+#include <stdint.h>
 #include <linux/fb.h>
 #include <config.h>