Fix HEADER1 on first page (Issue #544)

Author: michaelrsweet

CHANGES.md

@@ -10,6 +10,7 @@ v1.9.21 (YYYY-MM-DD)
 - Fixed a bug in the number-up code (Issue #539)
 - Fixed a regression in leading whitespace handling (Issue #540)
 - Fixed a bug in numbered heading support (Issue #543)
+- Fixed a bug with setting the header on the first page (Issue #544)
 
 
 v1.9.20 (2024-12-09)

htmldoc/ps-pdf.cxx

@@ -8489,6 +8489,9 @@ parse_comment(tree_t *t,	/* I - Tree to parse */
  else
  Header1[pos] = NULL;
 
+ check_pages(*page);
+ pages[*page].header1[pos] = (uchar *)Header1[pos];
+
  // Adjust top margin as needed...
  float adjust, image_adjust, temp_adjust;