Fix bug that made sending packets under Win fail

Using Windows, the packet size of USB packets has
to equal wMaxPacketSize defined in the so called
'endpoint descriptor' of the USB-HID (+ 1 byte with
the report ID; see HIDAPI doc)

source/hidapi.m

@@ -383,6 +383,9 @@ classdef hidapi < handle
             % wmsg does not need to be the max packet size. Uncommenting this doesn't affect
             % anything, and I would prefer sending short messages over long ones.
             % Further testing may be required, so for now I don't change a thing.
+            % (MMI) Update:: Okay, so under Windows, this line IS necessary, as well as the
+            % fixed write-buffer size of 1025 bytes (== wMaxPacketSize+1; smaller packets fail; 
+            % bigger packets do get handled by the brick, but the second assertion below will fail).
             wmsg(end+(hid.nWriteBuffer-length(wmsg))) = 0;
             
             % Create a uint8 pointer

source/usbBrickIO.m

@@ -27,7 +27,7 @@ classdef usbBrickIO < BrickIO
         % read buffer size
         nReadBuffer = 1024;
         % write buffer size
-        nWriteBuffer = 1024;
+        nWriteBuffer = 1025;
         % time-out period in milliseconds (if 0, no time-out)
         timeOut = 10000;
     end