vp9_ratectrl.h resolve visual studio warnings

Change-Id: If3a2edd744eb76337fa78f34d0e059cda2c6da54

vp9/encoder/vp9_firstpass.c

@@ -1453,8 +1453,8 @@ static void define_gf_group(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
   active_max_gf_interval =
     12 + ((int)vp9_convert_qindex_to_q(rc->last_q[INTER_FRAME]) >> 5);
 
-  if (active_max_gf_interval > (int)rc->max_gf_interval)
+  if (active_max_gf_interval > rc->max_gf_interval)
-    active_max_gf_interval = (int)rc->max_gf_interval;
+    active_max_gf_interval = rc->max_gf_interval;
 
   i = 0;
   while (i < twopass->static_scene_max_gf_interval &&

vp9/encoder/vp9_ratectrl.h

@@ -34,17 +34,17 @@ typedef struct {
   double key_frame_rate_correction_factor;
   double gf_rate_correction_factor;
 
-  unsigned int frames_since_golden;
+  int frames_since_golden;
-  unsigned int frames_till_gf_update_due;  // Count down till next GF
+  int frames_till_gf_update_due;
-  unsigned int max_gf_interval;
+  int max_gf_interval;
-  unsigned int baseline_gf_interval;
+  int baseline_gf_interval;
-  unsigned int frames_to_key;
+  int frames_to_key;
-  unsigned int frames_since_key;
+  int frames_since_key;
-  unsigned int this_key_frame_forced;
+  int this_key_frame_forced;
-  unsigned int next_key_frame_forced;
+  int next_key_frame_forced;
-  unsigned int source_alt_ref_pending;
+  int source_alt_ref_pending;
-  unsigned int source_alt_ref_active;
+  int source_alt_ref_active;
-  unsigned int is_src_frame_alt_ref;
+  int is_src_frame_alt_ref;
 
   int av_per_frame_bandwidth;     // Average frame size target for clip
   int min_frame_bandwidth;        // Minimum allocation used for any frame