thodg/libgit2

diff --git a/src/checkout.c b/src/checkout.c
index fed1819..d84b46b 100644
--- a/src/checkout.c
+++ b/src/checkout.c
@@ -1360,9 +1360,11 @@ fail:
 
 static bool should_remove_existing(checkout_data *data)
 {
-	int ignorecase = 0;
+	int ignorecase;
 
-	git_repository__cvar(&ignorecase, data->repo, GIT_CVAR_IGNORECASE);
+	if (git_repository__cvar(&ignorecase, data->repo, GIT_CVAR_IGNORECASE) < 0) {
+		ignorecase = 0;
+	}
 
 	return (ignorecase &&
 		(data->strategy & GIT_CHECKOUT_DONT_REMOVE_EXISTING) == 0);
diff --git a/src/delta-apply.c b/src/delta-apply.c
index 6e86a81..02ec7b7 100644
--- a/src/delta-apply.c
+++ b/src/delta-apply.c
@@ -121,13 +121,13 @@ int git__delta_apply(
 			size_t off = 0, len = 0;
 
 			if (cmd & 0x01) off = *delta++;
-			if (cmd & 0x02) off |= *delta++ << 8;
-			if (cmd & 0x04) off |= *delta++ << 16;
-			if (cmd & 0x08) off |= *delta++ << 24;
+			if (cmd & 0x02) off |= *delta++ << 8UL;
+			if (cmd & 0x04) off |= *delta++ << 16UL;
+			if (cmd & 0x08) off |= *delta++ << 24UL;
 
 			if (cmd & 0x10) len = *delta++;
-			if (cmd & 0x20) len |= *delta++ << 8;
-			if (cmd & 0x40) len |= *delta++ << 16;
+			if (cmd & 0x20) len |= *delta++ << 8UL;
+			if (cmd & 0x40) len |= *delta++ << 16UL;
 			if (!len)		len = 0x10000;
 
 			if (base_len < off + len || res_sz < len)
diff --git a/src/diff.c b/src/diff.c
index 64641da..26c0b89 100644
--- a/src/diff.c
+++ b/src/diff.c
@@ -1083,17 +1083,13 @@ static int handle_unmatched_new_item(
 		if (recurse_into_dir) {
 			error = iterator_advance_into(&info->nitem, info->new_iter);
 
-			/* if real error or no error, proceed with iteration */
-			if (error != GIT_ENOTFOUND)
-				return error;
-			giterr_clear();
+			/* if directory is empty, can't advance into it, so skip it */
+			if (error == GIT_ENOTFOUND) {
+				giterr_clear();
+				error = iterator_advance(&info->nitem, info->new_iter);
+			}
 
-			/* if directory is empty, can't advance into it, so either skip
-			 * it or ignore it
-			 */
-			if (error == GIT_ENOTFOUND || contains_oitem)
-				return iterator_advance(&info->nitem, info->new_iter);
-			delta_type = GIT_DELTA_IGNORED;
+			return error;
 		}
 	}
 
diff --git a/src/index.c b/src/index.c
index 63e4796..31cb27d 100644
--- a/src/index.c
+++ b/src/index.c
@@ -3008,7 +3008,7 @@ int git_index_read_index(
 
 		if (error < 0) {
 			giterr_set(GITERR_INDEX, "failed to insert entry");
-			return error;
+			goto done;
 		}
 
 		if (diff <= 0) {
diff --git a/src/merge_file.c b/src/merge_file.c
index 731f4b7..3f14a4f 100644
--- a/src/merge_file.c
+++ b/src/merge_file.c
@@ -134,8 +134,8 @@ static int merge_file__xdiff(
 
 	path = git_merge_file__best_path(
 		ancestor ? ancestor->path : NULL,
-		ours ? ours->path : NULL,
-		theirs ? theirs->path : NULL);
+		ours->path,
+		theirs->path);
 
 	if (path != NULL && (out->path = git__strdup(path)) == NULL) {
 		error = -1;
@@ -147,8 +147,8 @@ static int merge_file__xdiff(
 	out->len = mmbuffer.size;
 	out->mode = git_merge_file__best_mode(
 		ancestor ? ancestor->mode : 0,
-		ours ? ours->mode : 0,
-		theirs ? theirs->mode : 0);
+		ours->mode,
+		theirs->mode);
 
 done:
 	if (error < 0)
diff --git a/src/odb_loose.c b/src/odb_loose.c
index 9d9bffd..3c33160 100644
--- a/src/odb_loose.c
+++ b/src/odb_loose.c
@@ -91,7 +91,7 @@ static int object_mkdir(const git_buf *name, const loose_backend *be)
 
 static size_t get_binary_object_header(obj_hdr *hdr, git_buf *obj)
 {
-	unsigned char c;
+	unsigned long c;
 	unsigned char *data = (unsigned char *)obj->ptr;
 	size_t shift, size, used = 0;