GPU_batch: fix error w/ interior line removal

Caused glitch w/ navigation icons showing inner lines.

1 files changed, 4 insertions, 5 deletions

diff --git a/source/blender/gpu/intern/gpu_batch.c b/source/blender/gpu/intern/gpu_batch.c
index 6194e720156..391a3812073 100644
--- a/source/blender/gpu/intern/gpu_batch.c
+++ b/source/blender/gpu/intern/gpu_batch.c
@@ -215,13 +215,12 @@ Gwn_Batch *GPU_batch_wire_from_poly_2d_encoded(
 	{
 		qsort(lines, lines_len, sizeof(int32_t), BLI_sortutil_cmp_int);
 		lines_step = lines;
-
-		if (lines[0] != lines[1]) {
-			*lines_step++ = lines[0];
-		}
 		for (uint i_prev = 0, i = 1; i < lines_len; i_prev = i++) {
 			if (lines[i] != lines[i_prev]) {
-				*lines_step++ = lines[i];
+				*lines_step++ = lines[i_prev];
+			}
+			else {
+				i++;
 			}
 		}
 		lines_len = lines_step - lines;