Add cast to convert double to int

Change-Id: I7f63c2940256a5dadf9a29a853809290dd9e98ed

vp9/encoder/vp9_ratectrl.c

diff --git a/vp9/encoder/vp9_ratectrl.c b/vp9/encoder/vp9_ratectrl.c
index 8d316d6..6975137 100644
--- a/vp9/encoder/vp9_ratectrl.c
+++ b/vp9/encoder/vp9_ratectrl.c
@@ -1173,8 +1173,8 @@
   // Modify frame size target when down-scaling.
   if (cpi->oxcf.resize_mode == RESIZE_DYNAMIC &&
       rc->frame_size_selector != UNSCALED)
-    rc->this_frame_target =
-        rc->this_frame_target * rate_thresh_mult[rc->frame_size_selector];
+    rc->this_frame_target = (int)(rc->this_frame_target
+        * rate_thresh_mult[rc->frame_size_selector]);
 
   // Target rate per SB64 (including partial SB64s.
   rc->sb64_target_rate = ((int64_t)rc->this_frame_target * 64 * 64) /