added clamp of segment loop filter level

for ABSDATA mode, so segment loop filter level always fall in valid
range for both Absolute and delta modes.

Change-Id: If90df3411479533dbdab63f8ae088d2f5dd174a9

vp9/common/vp9_loopfilter.c

diff --git a/vp9/common/vp9_loopfilter.c b/vp9/common/vp9_loopfilter.c
index fe2056d..868a66a 100644
--- a/vp9/common/vp9_loopfilter.c
+++ b/vp9/common/vp9_loopfilter.c
@@ -262,9 +262,9 @@
     int lvl_seg = default_filt_lvl;
     if (vp9_segfeature_active(seg, seg_id, SEG_LVL_ALT_LF)) {
       const int data = vp9_get_segdata(seg, seg_id, SEG_LVL_ALT_LF);
-      lvl_seg = seg->abs_delta == SEGMENT_ABSDATA
-                  ? data
-                  : clamp(default_filt_lvl + data, 0, MAX_LOOP_FILTER);
+      lvl_seg = clamp(seg->abs_delta == SEGMENT_ABSDATA ?
+                      data : default_filt_lvl + data,
+                      0, MAX_LOOP_FILTER);
     }
 
     if (!lf->mode_ref_delta_enabled) {