Update libvpx snapshot to v0.9.7-p1 (Cayuga).

source/libvpx/y4minput.c

Index: source/libvpx/y4minput.c
===================================================================
--- source/libvpx/y4minput.c	(revision 96967)
+++ source/libvpx/y4minput.c	(working copy)
@@ -146,7 +146,6 @@
    mpeg2 and jpeg cases (thus requiring no vertical resampling).*/
 static void y4m_42xmpeg2_42xjpeg_helper(unsigned char *_dst,
  const unsigned char *_src,int _c_w,int _c_h){
-  int pli;
   int y;
   int x;
   for(y=0;y<_c_h;y++){
@@ -178,8 +177,6 @@
   int c_h;
   int c_sz;
   int pli;
-  int y;
-  int x;
   /*Skip past the luma data.*/
   _dst+=_y4m->pic_w*_y4m->pic_h;
   /*Compute the size of each chroma plane.*/
@@ -396,8 +393,6 @@
   int dst_c_w;
   int dst_c_h;
   int dst_c_sz;
-  int tmp_sz;
-  int pic_sz;
   int pli;
   /*Skip past the luma data.*/
   _dst+=_y4m->pic_w*_y4m->pic_h;
@@ -461,12 +456,9 @@
   int            c_w;
   int            c_h;
   int            c_sz;
-  int            dst_c_w;
   int            dst_c_h;
   int            dst_c_sz;
   int            pli;
-  int            y;
-  int            x;
   /*Skip past the luma data.*/
   _dst+=_y4m->pic_w*_y4m->pic_h;
   /*Compute the size of each chroma plane.*/
@@ -821,8 +813,6 @@
 int y4m_input_fetch_frame(y4m_input *_y4m,FILE *_fin,vpx_image_t *_img){
   char frame[6];
   int  pic_sz;
-  int  frame_c_w;
-  int  frame_c_h;
   int  c_w;
   int  c_h;
   int  c_sz;