thodg/libgit2

diff --git a/src/diff.c b/src/diff.c
index cea3fdb..a154e67 100644
--- a/src/diff.c
+++ b/src/diff.c
@@ -327,8 +327,7 @@ static git_diff_list *diff_list_alloc(
 	/* Use case-insensitive compare if either iterator has
 	 * the ignore_case bit set */
 	if (!git_iterator_ignore_case(old_iter) &&
-		!git_iterator_ignore_case(new_iter))
-	{
+		!git_iterator_ignore_case(new_iter)) {
 		diff->opts.flags &= ~GIT_DIFF_DELTAS_ARE_ICASE;
 
 		diff->strcomp    = git__strcmp;
@@ -777,8 +776,7 @@ static int handle_unmatched_new_item(
 
 		/* if not already inside an ignored dir, check if this is ignored */
 		if (delta_type != GIT_DELTA_IGNORED &&
-			git_iterator_current_is_ignored(info->new_iter))
-		{
+			git_iterator_current_is_ignored(info->new_iter)) {
 			delta_type = GIT_DELTA_IGNORED;
 			git_buf_sets(&info->ignore_prefix, nitem->path);
 		}
diff --git a/src/diff_output.c b/src/diff_output.c
index 4ce01bc..64ff6b5 100644
--- a/src/diff_output.c
+++ b/src/diff_output.c
@@ -101,8 +101,8 @@ static bool diff_delta_is_binary_forced(
 
 	/* make sure files are conceivably mmap-able */
 	if ((git_off_t)((size_t)delta->old_file.size) != delta->old_file.size ||
-		(git_off_t)((size_t)delta->new_file.size) != delta->new_file.size)
-	{
+		(git_off_t)((size_t)delta->new_file.size) != delta->new_file.size) {
+
 		delta->old_file.flags |= GIT_DIFF_FLAG_BINARY;
 		delta->new_file.flags |= GIT_DIFF_FLAG_BINARY;
 		delta->flags |= GIT_DIFF_FLAG_BINARY;
@@ -232,8 +232,7 @@ static int get_blob_content(
 	if (git_oid_iszero(&file->oid))
 		return 0;
 
-	if (file->mode == GIT_FILEMODE_COMMIT)
-	{
+	if (file->mode == GIT_FILEMODE_COMMIT) {
 		char oidstr[GIT_OID_HEXSZ+1];
 		git_buf content = GIT_BUF_INIT;
 
@@ -299,8 +298,8 @@ static int get_workdir_sm_content(
 	char oidstr[GIT_OID_HEXSZ+1];
 
 	if ((error = git_submodule_lookup(&sm, ctxt->repo, file->path)) < 0 ||
-		(error = git_submodule_status(&sm_status, sm)) < 0)
-	{
+		(error = git_submodule_status(&sm_status, sm)) < 0) {
+
 		/* GIT_EEXISTS means a "submodule" that has not been git added */
 		if (error == GIT_EEXISTS)
 			error = 0;
@@ -312,8 +311,8 @@ static int get_workdir_sm_content(
 		const git_oid* sm_head;
 
 		if ((sm_head = git_submodule_wd_id(sm)) != NULL ||
-			(sm_head = git_submodule_head_id(sm)) != NULL)
-		{
+			(sm_head = git_submodule_head_id(sm)) != NULL) {
+
 			git_oid_cpy(&file->oid, sm_head);
 			file->flags |= GIT_DIFF_FLAG_VALID_OID;
 		}
@@ -660,8 +659,8 @@ static int diff_patch_load(
 	 */
 	if (check_if_unmodified &&
 		delta->old_file.mode == delta->new_file.mode &&
-		!git_oid__cmp(&delta->old_file.oid, &delta->new_file.oid))
-	{
+		!git_oid__cmp(&delta->old_file.oid, &delta->new_file.oid)) {
+
 		delta->status = GIT_DELTA_UNMODIFIED;
 
 		if ((ctxt->opts->flags & GIT_DIFF_INCLUDE_UNMODIFIED) == 0)
@@ -1049,6 +1048,12 @@ char git_diff_status_char(git_delta_t status)
 	return code;
 }
 
+static int callback_error(void)
+{
+	giterr_clear();
+	return GIT_EUSER;
+}
+
 static int print_compact(
 	const git_diff_delta *delta, float progress, void *data)
 {
@@ -1083,10 +1088,7 @@ static int print_compact(
 
 	if (pi->print_cb(delta, NULL, GIT_DIFF_LINE_FILE_HDR,
 			git_buf_cstr(pi->buf), git_buf_len(pi->buf), pi->payload))
-	{
-		giterr_clear();
-		return GIT_EUSER;
-	}
+		return callback_error();
 
 	return 0;
 }
@@ -1200,10 +1202,7 @@ static int print_patch_file(
 
 	if (pi->print_cb(delta, NULL, GIT_DIFF_LINE_FILE_HDR,
 			git_buf_cstr(pi->buf), git_buf_len(pi->buf), pi->payload))
-	{
-		giterr_clear();
-		return GIT_EUSER;
-	}
+		return callback_error();
 
 	if ((delta->flags & GIT_DIFF_FLAG_BINARY) == 0)
 		return 0;
@@ -1217,10 +1216,7 @@ static int print_patch_file(
 
 	if (pi->print_cb(delta, NULL, GIT_DIFF_LINE_BINARY,
 			git_buf_cstr(pi->buf), git_buf_len(pi->buf), pi->payload))
-	{
-		giterr_clear();
-		return GIT_EUSER;
-	}
+		return callback_error();
 
 	return 0;
 }
@@ -1243,10 +1239,7 @@ static int print_patch_hunk(
 
 	if (pi->print_cb(d, r, GIT_DIFF_LINE_HUNK_HDR,
 			git_buf_cstr(pi->buf), git_buf_len(pi->buf), pi->payload))
-	{
-		giterr_clear();
-		return GIT_EUSER;
-	}
+		return callback_error();
 
 	return 0;
 }
@@ -1278,10 +1271,7 @@ static int print_patch_line(
 
 	if (pi->print_cb(delta, range, line_origin,
 			git_buf_cstr(pi->buf), git_buf_len(pi->buf), pi->payload))
-	{
-		giterr_clear();
-		return GIT_EUSER;
-	}
+		return callback_error();
 
 	return 0;
 }