Fix MSVC amd64 compilation warnings

src/checkout.c

@@ -25,7 +25,7 @@
 struct checkout_diff_data
 {
 	git_buf *path;
-	int workdir_len;
+	size_t workdir_len;
 	git_checkout_opts *checkout_opts;
 	git_indexer_stats *stats;
 	git_repository *owner;

src/diff_output.c

@@ -1354,9 +1354,9 @@ int git_diff_iterator_num_lines_in_hunk(git_diff_iterator *iter)
 		return error;
 
 	if (iter->hunk_curr)
-		return iter->hunk_curr->line_count;
+		return (int)iter->hunk_curr->line_count;
 	if (iter->hunk_head)
-		return iter->hunk_head->line_count;
+		return (int)iter->hunk_head->line_count;
 	return 0;
 }
 

src/transports/http.c

@@ -166,7 +166,7 @@ static int send_request(transport_http *t, const char *service, void *data, ssiz
 	}
 
 	if (WinHttpSendRequest(t->request, WINHTTP_NO_ADDITIONAL_HEADERS, 0,
-		data, content_length, content_length, 0) == FALSE) {
+		data, (DWORD)content_length, (DWORD)content_length, 0) == FALSE) {
 		giterr_set(GITERR_OS, "Failed to send request");
 		goto on_error;
 	}

src/win32/utf-conv.c

@@ -72,7 +72,7 @@ void git__utf8_to_16(wchar_t *dest, size_t length, const char *src)
 
 void git__utf8_to_16(wchar_t *dest, size_t length, const char *src)
 {
-	MultiByteToWideChar(CP_UTF8, 0, src, -1, dest, length);
+	MultiByteToWideChar(CP_UTF8, 0, src, -1, dest, (int)length);
 }
 
 void git__utf16_to_8(char *out, const wchar_t *input)