yuvconfig2image(): add explicit cast to avoid conv warning

prevents an int -> vpx_img_fmt_t conversion warning with high-bitdepth
as it modifies the image format

Change-Id: Ie3135d031565312613a036a1e6937abb59760a7e
diff --git a/vp10/vp10_iface_common.h b/vp10/vp10_iface_common.h
index 4bc3437..8e1bfc2 100644
--- a/vp10/vp10_iface_common.h
+++ b/vp10/vp10_iface_common.h
@@ -56,7 +56,7 @@
   if (yv12->flags & YV12_FLAG_HIGHBITDEPTH) {
     // vpx_image_t uses byte strides and a pointer to the first byte
     // of the image.
-    img->fmt |= VPX_IMG_FMT_HIGHBITDEPTH;
+    img->fmt = (vpx_img_fmt_t)(img->fmt | VPX_IMG_FMT_HIGHBITDEPTH);
     img->bit_depth = yv12->bit_depth;
     img->planes[VPX_PLANE_Y] = (uint8_t*)CONVERT_TO_SHORTPTR(yv12->y_buffer);
     img->planes[VPX_PLANE_U] = (uint8_t*)CONVERT_TO_SHORTPTR(yv12->u_buffer);
diff --git a/vp9/vp9_iface_common.h b/vp9/vp9_iface_common.h
index 58bb7d5..da7ae0e 100644
--- a/vp9/vp9_iface_common.h
+++ b/vp9/vp9_iface_common.h
@@ -56,7 +56,7 @@
   if (yv12->flags & YV12_FLAG_HIGHBITDEPTH) {
     // vpx_image_t uses byte strides and a pointer to the first byte
     // of the image.
-    img->fmt |= VPX_IMG_FMT_HIGHBITDEPTH;
+    img->fmt = (vpx_img_fmt_t)(img->fmt | VPX_IMG_FMT_HIGHBITDEPTH);
     img->bit_depth = yv12->bit_depth;
     img->planes[VPX_PLANE_Y] = (uint8_t*)CONVERT_TO_SHORTPTR(yv12->y_buffer);
     img->planes[VPX_PLANE_U] = (uint8_t*)CONVERT_TO_SHORTPTR(yv12->u_buffer);