Fixed bug #28311 (Transparency detection code is off by 1).

diff --git a/ext/gd/libgd/gd_topal.c b/ext/gd/libgd/gd_topal.c
index 68c74aa4032fae6c7a81a87f45260426967cae7c..60dbb6de65612a66ea79cafad9701d21243e381c 100644 (file)
--- a/ext/gd/libgd/gd_topal.c
+++ b/ext/gd/libgd/gd_topal.c
@@ -1260,7 +1260,7 @@ pass2_no_dither (j_decompress_ptr cinfo, JSAMPARRAY input_buf, JSAMPARRAY output
                         * will later be added at the end of the palette as the transparent
                         * index.
                         */
-                       if ((im->transparent >= 0) && (im->transparent == *inptr)) {
+                       if ((im->transparent >= 0) && (im->transparent == *(inptr - 1))) {
                                *outptr++ = im->colorsTotal;
                                continue;
                        }