thodg/libgit2

diff --git a/src/describe.c b/src/describe.c
index 9b41316..fb39c58 100644
--- a/src/describe.c
+++ b/src/describe.c
@@ -397,7 +397,7 @@ static int show_suffix(
 	const git_oid* id,
 	size_t abbrev_size)
 {
-	int error, size;
+	int error, size = 0;
 
 	char hex_oid[GIT_OID_HEXSZ];
 
@@ -818,7 +818,8 @@ int git_describe_format(git_buf *out, const git_describe_result *result, const g
 	/* If we didn't find *any* tags, we fall back to the commit's id */
 	if (result->fallback_to_id) {
 		char hex_oid[GIT_OID_HEXSZ + 1] = {0};
-		int size;
+		int size = 0;
+
 		if ((error = find_unique_abbrev_size(
 			     &size, repo, &result->commit_id, opts.abbreviated_size)) < 0)
 			return -1;
diff --git a/src/thread-utils.h b/src/thread-utils.h
index 8deedce..dd1136c 100644
--- a/src/thread-utils.h
+++ b/src/thread-utils.h
@@ -183,8 +183,10 @@ GIT_INLINE(int64_t) git_atomic64_add(git_atomic64 *a, int64_t addend)
 
 /* Pthreads Mutex */
 #define git_mutex unsigned int
-static int git_mutex_init(git_mutex* mutex) { GIT_UNUSED(mutex); return 0; }
-static int git_mutex_lock(git_mutex* mutex) { GIT_UNUSED(mutex); return 0; }
+GIT_INLINE(int) git_mutex_init(git_mutex *mutex) \
+	{ GIT_UNUSED(mutex); return 0; }
+GIT_INLINE(int) git_mutex_lock(git_mutex *mutex) \
+	{ GIT_UNUSED(mutex); return 0; }
 #define git_mutex_unlock(a) (void)0
 #define git_mutex_free(a) (void)0
 
diff --git a/src/transaction.c b/src/transaction.c
index ebb943c..1a4fffb 100644
--- a/src/transaction.c
+++ b/src/transaction.c
@@ -274,7 +274,7 @@ static int update_target(git_refdb *db, transaction_node *node)
 	} else if (node->ref_type == GIT_REF_SYMBOLIC) {
 		ref = git_reference__alloc_symbolic(node->name, node->target.symbolic);
 	} else {
-		assert(0);
+		abort();
 	}
 
 	GITERR_CHECK_ALLOC(ref);
@@ -287,7 +287,7 @@ static int update_target(git_refdb *db, transaction_node *node)
 	} else if (node->ref_type == GIT_REF_SYMBOLIC) {
 		error = git_refdb_unlock(db, node->payload, true, update_reflog, ref, node->sig, node->message);
 	} else {
-		assert(0);
+		abort();
 	}
 
 	git_reference_free(ref);
@@ -300,7 +300,7 @@ int git_transaction_commit(git_transaction *tx)
 {
 	transaction_node *node;
 	git_strmap_iter pos;
-	int error;
+	int error = 0;
 
 	assert(tx);
 
diff --git a/src/transports/http.c b/src/transports/http.c
index bcfeaee..4070b68 100644
--- a/src/transports/http.c
+++ b/src/transports/http.c
@@ -552,7 +552,7 @@ static int http_connect(http_subtransport *t)
 #ifdef GIT_SSL
 	if ((!error || error == GIT_ECERTIFICATE) && t->owner->certificate_check_cb != NULL) {
                 X509 *cert = SSL_get_peer_certificate(t->socket.ssl.ssl);
-		git_cert_x509 cert_info;
+		git_cert_x509 cert_info, *cert_info_ptr;
                 int len, is_valid;
 		unsigned char *guard, *encoded_cert;
 
@@ -581,7 +581,10 @@ static int http_connect(http_subtransport *t)
 		cert_info.cert_type = GIT_CERT_X509;
 		cert_info.data = encoded_cert;
 		cert_info.len = len;
-		error = t->owner->certificate_check_cb((git_cert *) &cert_info, is_valid, t->connection_data.host, t->owner->message_cb_payload);
+
+		cert_info_ptr = &cert_info;
+
+		error = t->owner->certificate_check_cb((git_cert *) cert_info_ptr, is_valid, t->connection_data.host, t->owner->message_cb_payload);
 		git__free(encoded_cert);
 
 		if (error < 0) {
diff --git a/src/transports/ssh.c b/src/transports/ssh.c
index 3868a52..39e4e3d 100644
--- a/src/transports/ssh.c
+++ b/src/transports/ssh.c
@@ -480,7 +480,7 @@ static int _git_ssh_setup_conn(
 		goto on_error;
 
 	if (t->owner->certificate_check_cb != NULL) {
-		git_cert_hostkey cert = { 0 };
+		git_cert_hostkey cert = { 0 }, *cert_ptr;
 		const char *key;
 
 		cert.cert_type = GIT_CERT_HOSTKEY_LIBSSH2;
@@ -504,7 +504,10 @@ static int _git_ssh_setup_conn(
 
 		/* We don't currently trust any hostkeys */
 		giterr_clear();
-		error = t->owner->certificate_check_cb((git_cert *) &cert, 0, host, t->owner->message_cb_payload);
+
+		cert_ptr = &cert;
+
+		error = t->owner->certificate_check_cb((git_cert *) cert_ptr, 0, host, t->owner->message_cb_payload);
 		if (error < 0) {
 			if (!giterr_last())
 				giterr_set(GITERR_NET, "user cancelled hostkey check");