Fix NULL pointer dereference crashes

Signed-off-by: Nathan Hjelm <hjelmn@google.com>

libusb/os/poll_windows.c

diff --git a/libusb/os/poll_windows.c b/libusb/os/poll_windows.c
index 5282e7d..c8eff81 100644
--- a/libusb/os/poll_windows.c
+++ b/libusb/os/poll_windows.c
@@ -71,8 +71,8 @@
 
 static void smart_realloc_fd_table_space(int inc)
 {
-	if (fd_count + inc > fd_size) {
-		struct file_descriptor **p = (struct file_descriptor *)realloc(fd_table, (fd_size + INC_FDS_EACH) * sizeof(struct file_descriptor *));
+	if (fd_table == NULL || fd_count + inc > fd_size) {
+		struct file_descriptor **p = (struct file_descriptor **)realloc(fd_table, (fd_size + INC_FDS_EACH) * sizeof(struct file_descriptor *));
 		if (p != NULL) {
 			memset(p + fd_size, 0, INC_FDS_EACH * sizeof(struct file_descriptor *));
 			fd_size += INC_FDS_EACH;

libusb/version_nano.h

diff --git a/libusb/version_nano.h b/libusb/version_nano.h
index 9447804..8dc8177 100644
--- a/libusb/version_nano.h
+++ b/libusb/version_nano.h
@@ -1 +1 @@
-#define LIBUSB_NANO 11394
+#define LIBUSB_NANO 11395