Windows: Check for "calloc" allocation failure.

It need to check return value  of calloc. It may fail & return Null.

Closes #67

Signed-off-by: Chris Dickens <christopher.a.dickens@gmail.com>

diff --git a/libusb/os/windows_usb.c b/libusb/os/windows_usb.c
index e6a0483..ccff8a1 100644 (file)
--- a/libusb/os/windows_usb.c
+++ b/libusb/os/windows_usb.c
@@ -1661,6 +1661,10 @@ static int windows_get_device_list(struct libusb_context *ctx, struct discovered
                                                        LOOP_BREAK(LIBUSB_ERROR_OVERFLOW);
                                                }
                                                if_guid = (GUID*) calloc(1, sizeof(GUID));
+                                               if (if_guid == NULL) {
+                                                       usbi_err(ctx, "could not calloc for if_guid: not enough memory");
+                                                       LOOP_BREAK(LIBUSB_ERROR_NO_MEM);
+                                               }
                                                pCLSIDFromString(guid_string_w, if_guid);
                                                guid[nb_guids++] = if_guid;
                                                usbi_dbg("extra GUID: %s", guid_to_string(if_guid));