gnu: libhx: Update to 4.1.

* gnu/packages/patches/libhx-fix-double-free-bug.patch: Remove file.
* gnu/local.mk (dist_patch_DATA): Remove it.
* gnu/packages/c.scm (libhx): Update to 4.1.
  [source]: Remove patch.

gnu/local.mk

@@ -1380,7 +1380,6 @@ dist_patch_DATA =						\
   %D%/packages/patches/libgnome-encoding.patch			\
   %D%/packages/patches/libgnomeui-utf8.patch			\
   %D%/packages/patches/libgrss-CVE-2016-2001.patch		\
-  %D%/packages/patches/libhx-fix-double-free-bug.patch		\
   %D%/packages/patches/libjxr-fix-function-signature.patch	\
   %D%/packages/patches/libjxr-fix-typos.patch			\
   %D%/packages/patches/libofa-ftbfs-1.diff		\

gnu/packages/c.scm

@@ -252,15 +252,14 @@ whose behaviour is inconsistent across *NIX flavours.")
 (define-public libhx
   (package
     (name "libhx")
-    (version "4.0.1")
+    (version "4.1")
     (source
      (origin
        (method url-fetch)
        (uri (string-append "https://inai.de/files/libhx/"
                            "libHX-" version ".tar.xz"))
        (sha256
-        (base32 "1f4rmarym1j368cbxhqzyvdn5dk4bh8951s19ffqwql16anqsgfr"))
-       (patches (search-patches "libhx-fix-double-free-bug.patch"))))
+        (base32 "1mifpzxr5kma7gawhv1vbga8j5qi8jgka0axr48v08bdpb83pya2"))))
     (build-system gnu-build-system)
     (home-page "https://inai.de/projects/libhx/")
     (synopsis "C library with common data structures and functions")

gnu/packages/patches/libhx-fix-double-free-bug.patch

@@ -1,80 +0,0 @@
-From a08eabc6e5a3e0a9c7a15ca15ff7d450ecb6db88 Mon Sep 17 00:00:00 2001
-From: Jan Engelhardt <jengelh@inai.de>
-Date: Tue, 12 Oct 2021 17:32:43 +0200
-Subject: [PATCH] io: fix a use-after-free in conjunction with HX_realpath
-
-HX_readlink(&x, ...) forgot to set x to nullptr upon error, which
-trips up subsequent calls to HX_readlink with the very same x.
-
-Fixes: v3.26-1-g97f4be2
----
- src/io.c          |  8 ++++++--
- src/tc-realpath.c | 10 ++++++++++
- 2 files changed, 16 insertions(+), 2 deletions(-)
-
-diff --git a/src/io.c b/src/io.c
-index 95d6fd6..14078fc 100644
---- a/src/io.c
-+++ b/src/io.c
-@@ -316,8 +316,10 @@ EXPORT_SYMBOL int HX_readlink(hxmc_t **target, const char *path)
- 		ssize_t ret = readlink(path, *target, linkbuf_size);
- 		if (ret < 0) {
- 			int saved_errno = errno;
--			if (allocate)
-+			if (allocate) {
- 				HXmc_free(*target);
-+				*target = nullptr;
-+			}
- 			return -(errno = saved_errno);
- 		}
- 		if (static_cast(size_t, ret) < linkbuf_size) {
-@@ -327,8 +329,10 @@ EXPORT_SYMBOL int HX_readlink(hxmc_t **target, const char *path)
- 		linkbuf_size *= 2;
- 		if (HXmc_setlen(target, linkbuf_size) == NULL) {
- 			int saved_errno = errno;
--			if (allocate)
-+			if (allocate) {
- 				HXmc_free(*target);
-+				*target = nullptr;
-+			}
- 			return -(errno = saved_errno);
- 		}
- 	}
-diff --git a/src/tc-realpath.c b/src/tc-realpath.c
-index 5dd9aa2..c2ef15a 100644
---- a/src/tc-realpath.c
-+++ b/src/tc-realpath.c
-@@ -11,6 +11,7 @@
- #include <stdlib.h>
- #include <libHX/io.h>
- #include <libHX/option.h>
-+#include <libHX/string.h>
- 
- static unsigned int rp_flags;
- static unsigned int rp_absolute;
-@@ -42,6 +43,14 @@ static bool rp_get_options(int *argc, const char ***argv)
- 	return true;
- }
- 
-+static void t_1(void)
-+{
-+	hxmc_t *tmp = HXmc_strinit("");
-+	/* two components, so that HX_readlink gets called twice */
-+	HX_realpath(&tmp, "/dev/tty", HX_REALPATH_DEFAULT);
-+	HXmc_free(tmp);
-+}
-+
- int main(int argc, const char **argv)
- {
- 	hxmc_t *res;
-@@ -49,6 +58,7 @@ int main(int argc, const char **argv)
- 
- 	if (!rp_get_options(&argc, &argv))
- 		return EXIT_FAILURE;
-+	t_1();
- 
- 	res = NULL;
- 	while (--argc > 0) {
--- 
-2.33.0
-