libmix: change the type of fields in VABoolCoderContextVPX

BZ: 120268

Change the type of fields in VABoolCoderContextVPX to
"unsigned char".

Change-Id: I007352e4226249b982bd079d2a418f939cd3aaba
Signed-off-by: Tianmi Chen <tianmi.chen@intel.com>
Reviewed-on: http://android.intel.com:8080/116512
Reviewed-by: Shi, PingX <pingx.shi@intel.com>
Tested-by: Shi, PingX <pingx.shi@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>
diff --git a/mix_vbp/viddec_fw/fw/parser/vbp_vp8_parser.c b/mix_vbp/viddec_fw/fw/parser/vbp_vp8_parser.c
index 5ac5402..72dcfa9 100644
--- a/mix_vbp/viddec_fw/fw/parser/vbp_vp8_parser.c
+++ b/mix_vbp/viddec_fw/fw/parser/vbp_vp8_parser.c
@@ -428,7 +428,7 @@
 
     /* Bool coder */
     pic_parms->bool_coder_ctx.range = pi->bool_coder.range;
-    pic_parms->bool_coder_ctx.value = pi->bool_coder.value;
+    pic_parms->bool_coder_ctx.value = (pi->bool_coder.value >> 24) & 0xFF;
     pic_parms->bool_coder_ctx.count = pi->bool_coder.count;
 
     //pic_parms->current_picture = VA_INVALID_SURFACE;