stress: test_get_device_list: change printf format for ssize_t

The type of list_size is ssize_t.
First idea was to use "%zd" printf format specifier.
But that is not supported by Visual Studio 2013.

Use "%ld" + cast list_size to long.

Closes #751

Suggested-by: Chris Dickens <christopher.a.dickens@gmail.com>
Signed-off-by: Uri Lublin <uril@redhat.com>
Signed-off-by: Chris Dickens <christopher.a.dickens@gmail.com>

libusb/version_nano.h

diff --git a/libusb/version_nano.h b/libusb/version_nano.h
index 820c720..ea0c971 100644
--- a/libusb/version_nano.h
+++ b/libusb/version_nano.h
@@ -1 +1 @@
-#define LIBUSB_NANO 11524
+#define LIBUSB_NANO 11525

tests/stress.c

diff --git a/tests/stress.c b/tests/stress.c
index 0e2dbe5..1602ee9 100644
--- a/tests/stress.c
+++ b/tests/stress.c
@@ -60,8 +60,8 @@
 		ssize_t list_size = libusb_get_device_list(ctx, &device_list);
 		if (list_size < 0 || device_list == NULL) {
 			libusb_testlib_logf(tctx,
-				"Failed to get device list on iteration %d: %d (%p)",
-				i, -list_size, device_list);
+				"Failed to get device list on iteration %d: %ld (%p)",
+				i, (long)-list_size, device_list);
 			return TEST_STATUS_FAILURE;
 		}
 		libusb_free_device_list(device_list, 1);