Fix builds when libpng is not available.

michaelrsweet · Dec 18, 2021 · 48b605c · 48b605c
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diff --git a/CHANGES.md b/CHANGES.md
@@ -1,6 +1,7 @@
 # Changes in HTMLDOC v1.9.14
 
 - Fixed the PDF creation date (Issue #455)
+- Fixed a compile issue when libpng was not available (Issue #458)
 
 
 # Changes in HTMLDOC v1.9.13

diff --git a/htmldoc/image.cxx b/htmldoc/image.cxx
@@ -13,6 +13,7 @@
  */
 
 #include "htmldoc.h"
+#include <setjmp.h>
 
 #ifdef HAVE_LIBJPEG
 extern "C" {		/* Workaround for JPEG header problems... */