Limit boundary PU sizes in case of errors

In case of error clips, some PUs are marked as skip.
Ensure such PUs stay within the picture

Bug: 37615911
Test: ran POC included with the bug.
Change-Id: Ie0aeccc752cf556f9dea84de61c15a7906e1060b
(cherry picked from commit 62830d130b33ab196245e8fbda63639fe9420c18)
diff --git a/decoder/ihevcd_parse_slice.c b/decoder/ihevcd_parse_slice.c
index 25cca05..acb6cd4 100644
--- a/decoder/ihevcd_parse_slice.c
+++ b/decoder/ihevcd_parse_slice.c
@@ -2708,6 +2708,17 @@
         {
             tu_t *ps_tu = ps_codec->s_parse.ps_tu;
             pu_t *ps_pu = ps_codec->s_parse.ps_pu;
+            WORD32 pu_skip_wd, pu_skip_ht;
+            WORD32 rows_remaining, cols_remaining;
+
+            /* Set pu wd and ht based on whether the ctb is complete or not */
+            rows_remaining = ps_sps->i2_pic_height_in_luma_samples
+                            - (ps_codec->s_parse.i4_ctb_y << ps_sps->i1_log2_ctb_size);
+            pu_skip_ht = MIN(ctb_size, rows_remaining);
+
+            cols_remaining = ps_sps->i2_pic_width_in_luma_samples
+                            - (ps_codec->s_parse.i4_ctb_x << ps_sps->i1_log2_ctb_size);
+            pu_skip_wd = MIN(ctb_size, cols_remaining);
 
             ps_tu->b1_cb_cbf = 0;
             ps_tu->b1_cr_cbf = 0;
@@ -2731,8 +2742,8 @@
             ps_pu->b2_part_idx = 0;
             ps_pu->b4_pos_x = 0;
             ps_pu->b4_pos_y = 0;
-            ps_pu->b4_wd = (ctb_size >> 2) - 1;
-            ps_pu->b4_ht = (ctb_size >> 2) - 1;
+            ps_pu->b4_wd = (pu_skip_wd >> 2) - 1;
+            ps_pu->b4_ht = (pu_skip_ht >> 2) - 1;
             ps_pu->b1_intra_flag = 0;
             ps_pu->b3_part_mode = ps_codec->s_parse.s_cu.i4_part_mode;
             ps_pu->b1_merge_flag = 1;