From 59a68c83f0ead9bac34afecba6989b71fb4902bd Mon Sep 17 00:00:00 2001
From: John Bowler <jbowler@acm.org>
Date: Tue, 30 Jan 2024 14:00:45 -0800
Subject: [PATCH] Fix contrib/conftest/pngcp.dfa

This was broken by the corrections to the 'palette max' handling; if
that is disabled the test of num_palette_max must be removed in pnread.c

Signed-off-by: John Bowler <jbowler@acm.org>
---
 pngread.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/pngread.c b/pngread.c
index 008a41856..07a39df6e 100644
--- a/pngread.c
+++ b/pngread.c
@@ -568,7 +568,11 @@ png_read_row(png_structrp png_ptr, png_bytep row, png_bytep dsp_row)
 #endif
 
 #ifdef PNG_READ_TRANSFORMS_SUPPORTED
-   if (png_ptr->transformations || png_ptr->num_palette_max >= 0)
+   if (png_ptr->transformations
+#     ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED
+         || png_ptr->num_palette_max >= 0
+#     endif
+      )
       png_do_read_transformations(png_ptr, &row_info);
 #endif