git: update to v2.0.3

This is slightly more involved than just bumping the version number
because it pulls in a change to convert the commit buffer to a slab,
removing the "buffer" field from "struct commit".  All sites that access
"commit->buffer" have been changed to use the new functions provided for
this purpose.

Signed-off-by: John Keeping <john@keeping.me.uk>

Makefile

@@ -14,7 +14,7 @@ htmldir = $(docdir)
 pdfdir = $(docdir)
 mandir = $(prefix)/share/man
 SHA1_HEADER = <openssl/sha.h>
-GIT_VER = 2.0.1
+GIT_VER = 2.0.3
 GIT_URL = https://www.kernel.org/pub/software/scm/git/git-$(GIT_VER).tar.gz
 INSTALL = install
 COPYTREE = cp -r

git

@@ -1 +1 @@
-Subproject commit 341e7e8eda3dbeb6867f4f8f45b671201b807de5
+Subproject commit 740c281d21ef5b27f6f1b942a4f2fc20f51e8c7e

parsing.c

@@ -132,7 +132,8 @@ static const char *reencode(char **txt, const char *src_enc, const char *dst_enc
 struct commitinfo *cgit_parse_commit(struct commit *commit)
 {
 	struct commitinfo *ret;
-	const char *p = commit->buffer, *t;
+	const char *p = get_cached_commit_buffer(commit, NULL);
+	const char *t;
 
 	ret = xmalloc(sizeof(*ret));
 	ret->commit = commit;

ui-atom.c

@@ -133,8 +133,7 @@ void cgit_print_atom(char *tip, char *path, int max_count)
 	}
 	while ((commit = get_revision(&rev)) != NULL) {
 		add_entry(commit, host);
-		free(commit->buffer);
+		free_commit_buffer(commit);
-		commit->buffer = NULL;
 		free_commit_list(commit->parents);
 		commit->parents = NULL;
 	}

ui-log.c

@@ -388,16 +388,14 @@ void cgit_print_log(const char *tip, int ofs, int cnt, char *grep, char *pattern
 		ofs = 0;
 
 	for (i = 0; i < ofs && (commit = get_revision(&rev)) != NULL; i++) {
-		free(commit->buffer);
+		free_commit_buffer(commit);
-		commit->buffer = NULL;
 		free_commit_list(commit->parents);
 		commit->parents = NULL;
 	}
 
 	for (i = 0; i < cnt && (commit = get_revision(&rev)) != NULL; i++) {
 		print_commit(commit, &rev);
-		free(commit->buffer);
+		free_commit_buffer(commit);
-		commit->buffer = NULL;
 		free_commit_list(commit->parents);
 		commit->parents = NULL;
 	}

ui-stats.c

@@ -244,7 +244,7 @@ static struct string_list collect_stats(struct cgit_period *period)
 	memset(&authors, 0, sizeof(authors));
 	while ((commit = get_revision(&rev)) != NULL) {
 		add_commit(&authors, commit, period);
-		free(commit->buffer);
+		free_commit_buffer(commit);
 		free_commit_list(commit->parents);
 	}
 	return authors;