Fix gf_interval for single pass without LAP

This change allows alt refs to be placed for lag_in_frames lower
than 32.

STATS_CHANGED

Change-Id: Ic3bbc8197aae63bd73a194eb0fb503d955185fe5
diff --git a/av1/encoder/pass2_strategy.c b/av1/encoder/pass2_strategy.c
index 195f578..99be5aa 100644
--- a/av1/encoder/pass2_strategy.c
+++ b/av1/encoder/pass2_strategy.c
@@ -1077,7 +1077,7 @@
 
   if (has_no_stats_stage(cpi)) {
     for (i = 0; i < MAX_NUM_GF_INTERVALS; i++) {
-      rc->gf_intervals[i] = MAX_GF_INTERVAL;
+      rc->gf_intervals[i] = AOMMIN(rc->max_gf_interval, max_gop_length);
     }
     rc->cur_gf_index = 0;
     rc->intervals_till_gf_calculate_due = MAX_NUM_GF_INTERVALS;