From 29ceae4b8c01f6f485cdfda4462cd53f30850a8b Mon Sep 17 00:00:00 2001
From: willson-chen <willson.chenwx@gmail.com>
Date: Sat, 7 Dec 2019 10:56:37 +0800
Subject: [PATCH] ext/gd: fix new_a init error in gdImageConvolution()

---
 ext/gd/libgd/gd_filter.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/ext/gd/libgd/gd_filter.c b/ext/gd/libgd/gd_filter.c
index 566330668ea25..db364c923ec60 100644
--- a/ext/gd/libgd/gd_filter.c
+++ b/ext/gd/libgd/gd_filter.c
@@ -362,6 +362,7 @@ int gdImageConvolution(gdImagePtr src, float filter[3][3], float filter_div, flo
 	for ( y=0; y<src->sy; y++) {
 		for(x=0; x<src->sx; x++) {
 			new_r = new_g = new_b = 0;
+			pxl = f(srcback, x, y);
 			new_a = gdImageAlpha(srcback, pxl);
 
 			for (j=0; j<3; j++) {