fix #64725, wrong res check

diff --git a/ext/gd/gd.c b/ext/gd/gd.c
index 60056d1d54c8adae445f9b2d20f9a3bfc8c57040..4e118d16b453a0d5332ba71f0b915638e2558bd3 100644 (file)
--- a/ext/gd/gd.c
+++ b/ext/gd/gd.c
@@ -5576,7 +5576,7 @@ PHP_FUNCTION(imageaffinematrixget)
                        RETURN_FALSE;
        }
 
-       if (res = GD_FALSE) {
+       if (res == GD_FALSE) {
                RETURN_FALSE;
        } else {
                array_init(return_value);