GIF: Ensure frame clipping is applied to max lzw output length.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/gif.c b/src/gif.c
index aeb70f2..84d4209 100644
--- a/src/gif.c
+++ b/src/gif.c
@@ -525,7 +525,7 @@ static nsgif_error nsgif__decode_simple(
 		uint32_t *restrict frame_data,
 		uint32_t *restrict colour_table)
 {
-	uint32_t pixels = gif->info.width * height;
+	uint32_t pixels;
 	uint32_t written = 0;
 	nsgif_error ret = NSGIF_OK;
 	lzw_result res;
@@ -550,6 +550,7 @@ static nsgif_error nsgif__decode_simple(
 	}
 
 	frame_data += (offset_y * gif->info.width);
+	pixels = gif->info.width * height;
 
 	while (pixels > 0) {
 		res = lzw_decode_map(gif->lzw_ctx,