thodg/libgit2

diff --git a/CHANGELOG.md b/CHANGELOG.md
index fa65991..c0a819e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,10 @@ v0.23 + 1
 
 ### Changes or improvements
 
+* Custom filters can now be registered with wildcard attributes, for
+  example `filter=*`.  Consumers should examine the attributes parameter
+  of the `check` function for details.
+
 ### API additions
 
 ### API removals
@@ -92,10 +96,6 @@ v0.23
 * If libcurl is installed, we will use it to connect to HTTP(S)
   servers.
 
-* Custom filters can now be registered with wildcard attributes, for
-  example `filter=*`.  Consumers should examine the attributes parameter
-  of the `check` function for details.
-
 ### API additions
 
 * The `git_merge_options` gained a `file_flags` member.
diff --git a/src/khash.h b/src/khash.h
index 818ac83..71eb583 100644
--- a/src/khash.h
+++ b/src/khash.h
@@ -619,4 +619,4 @@ typedef const char *kh_cstr_t;
 #define KHASH_MAP_INIT_STR(name, khval_t)								\
 	KHASH_INIT(name, kh_cstr_t, khval_t, 1, kh_str_hash_func, kh_str_hash_equal)
 
-#endif /* __AC_KHASH_H */
\ No newline at end of file
+#endif /* __AC_KHASH_H */
diff --git a/src/xdiff/xdiffi.c b/src/xdiff/xdiffi.c
index 2358a2d..0620e5f 100644
--- a/src/xdiff/xdiffi.c
+++ b/src/xdiff/xdiffi.c
@@ -544,6 +544,8 @@ static int xdl_call_hunk_func(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb,
 {
 	xdchange_t *xch, *xche;
 
+	(void)xe;
+
 	for (xch = xscr; xch; xch = xche->next) {
 		xche = xdl_get_hunk(&xch, xecfg);
 		if (!xch)
diff --git a/src/xdiff/xemit.c b/src/xdiff/xemit.c
index 750a972..600fd1f 100644
--- a/src/xdiff/xemit.c
+++ b/src/xdiff/xemit.c
@@ -90,7 +90,7 @@ xdchange_t *xdl_get_hunk(xdchange_t **xscr, xdemitconf_t const *xecfg)
 		} else if (distance < max_ignorable && xch->ignore) {
 			ignored += xch->chg2;
 		} else if (lxch != xchp &&
-			   xch->i1 + ignored - (lxch->i1 + lxch->chg1) > max_common) {
+			   xch->i1 + ignored - (lxch->i1 + lxch->chg1) > (unsigned long)max_common) {
 			break;
 		} else if (!xch->ignore) {
 			lxch = xch;
diff --git a/tests/filter/wildcard.c b/tests/filter/wildcard.c
index ba826b5..999b336 100644
--- a/tests/filter/wildcard.c
+++ b/tests/filter/wildcard.c
@@ -9,7 +9,7 @@
 
 static git_repository *g_repo = NULL;
 
-static git_filter *create_wildcard_filter();
+static git_filter *create_wildcard_filter(void);
 
 #define DATA_LEN 32
 
@@ -63,6 +63,9 @@ static int wildcard_filter_check(
 	const git_filter_source *src,
 	const char **attr_values)
 {
+	GIT_UNUSED(self);
+	GIT_UNUSED(src);
+
 	if (strcmp(attr_values[0], "wcflip") == 0 ||
 		strcmp(attr_values[0], "wcreverse") == 0) {
 		*payload = git__strdup(attr_values[0]);
@@ -91,10 +94,10 @@ static int wildcard_filter_apply(
 	return GIT_PASSTHROUGH;
 }
 
-static int wildcard_filter_cleanup(git_filter *self, void *payload)
+static void wildcard_filter_cleanup(git_filter *self, void *payload)
 {
+	GIT_UNUSED(self);
 	git__free(payload);
-	return 0;
 }
 
 static void wildcard_filter_free(git_filter *f)
@@ -102,7 +105,7 @@ static void wildcard_filter_free(git_filter *f)
 	git__free(f);
 }
 
-static git_filter *create_wildcard_filter()
+static git_filter *create_wildcard_filter(void)
 {
 	git_filter *filter = git__calloc(1, sizeof(git_filter));
 	cl_assert(filter);
@@ -125,7 +128,7 @@ void test_filter_wildcard__reverse(void)
 	cl_git_pass(git_filter_list_load(
 		&fl, g_repo, NULL, "hero-reverse-foo", GIT_FILTER_TO_ODB, 0));
 
-	cl_git_pass(git_buf_put(&in, input, DATA_LEN));
+	cl_git_pass(git_buf_put(&in, (char *)input, DATA_LEN));
 	cl_git_pass(git_filter_list_apply_to_data(&out, fl, &in));
 
 	cl_assert_equal_i(DATA_LEN, out.size);
@@ -146,7 +149,7 @@ void test_filter_wildcard__flip(void)
 	cl_git_pass(git_filter_list_load(
 		&fl, g_repo, NULL, "hero-flip-foo", GIT_FILTER_TO_ODB, 0));
 
-	cl_git_pass(git_buf_put(&in, input, DATA_LEN));
+	cl_git_pass(git_buf_put(&in, (char *)input, DATA_LEN));
 	cl_git_pass(git_filter_list_apply_to_data(&out, fl, &in));
 
 	cl_assert_equal_i(DATA_LEN, out.size);
@@ -167,7 +170,7 @@ void test_filter_wildcard__none(void)
 	cl_git_pass(git_filter_list_load(
 		&fl, g_repo, NULL, "none-foo", GIT_FILTER_TO_ODB, 0));
 
-	cl_git_pass(git_buf_put(&in, input, DATA_LEN));
+	cl_git_pass(git_buf_put(&in, (char *)input, DATA_LEN));
 	cl_git_pass(git_filter_list_apply_to_data(&out, fl, &in));
 
 	cl_assert_equal_i(DATA_LEN, out.size);