Merge "Fix ubsan warning: vp9_cx_iface.c"

vp9/vp9_cx_iface.c

@@ -978,7 +978,7 @@ static int64_t timebase_units_to_ticks(const vpx_rational_t *timebase,
 
 static int64_t ticks_to_timebase_units(const vpx_rational_t *timebase,
                                        int64_t n) {
-  const int64_t round = TICKS_PER_SEC * timebase->num / 2 - 1;
+  const int64_t round = (int64_t)TICKS_PER_SEC * timebase->num / 2 - 1;
   return (n * timebase->den + round) / timebase->num / TICKS_PER_SEC;
 }