Add missing #include, patch by Jan Knutar, jknutar nic fi.

git-svn-id: file:///var/local/repositories/mplayer/trunk/libswscale@27033 b3059339-0415-0410-9bf9-f77b7e298cf2

yuv2rgb_vis.c

@@ -23,6 +23,7 @@
 #include <stdlib.h>
 
 #include "swscale.h"
+#include "swscale_internal.h"
 
 #define YUV2RGB_INIT \
     "wr %%g0, 0x10, %%gsr \n\t" \