app-text/xpdf: fix build w/ libpaper-2

Closes: https://bugs.gentoo.org/870217
Signed-off-by: Sam James <sam@gentoo.org>

app-text/xpdf/files/xpdf-4.04-libpaper-2.patch

@@ -0,0 +1,14 @@
+https://bugs.gentoo.org/870217
+https://forum.xpdfreader.com/viewtopic.php?t=42367
+https://github.com/rrthomas/libpaper/issues/29
+--- a/xpdf/GlobalParams.cc
++++ b/xpdf/GlobalParams.cc
+@@ -655,7 +655,7 @@ GlobalParams::GlobalParams(const char *cfgFileName) {
+   base14SysFonts = new GHash(gTrue);
+   sysFonts = new SysFontList();
+ #if HAVE_PAPER_H
+-  char *paperName;
++  const char *paperName;
+   const struct paper *paperType;
+   paperinit();
+   if ((paperName = systempapername())) {

app-text/xpdf/xpdf-4.04-r1.ebuild

@@ -1,4 +1,4 @@
-# Copyright 1999-2022 Gentoo Authors
+# Copyright 1999-2023 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
@@ -55,6 +55,7 @@ PATCHES=(
 	"${FILESDIR}"/${PN}-automagic.patch
 	"${FILESDIR}"/${PN}-visibility.patch
 	"${FILESDIR}"/${PN}-shared-libs.patch
+	"${FILESDIR}"/${PN}-4.04-libpaper-2.patch
 )
 
 DOCS=( ANNOUNCE CHANGES README )