Update spikegadgetsrawio.py

Fix issue #1432.

Author: gkBCCN

neo/rawio/spikegadgetsrawio.py

@@ -107,9 +107,10 @@ def _parse_header(self):
         stream_bytes = {}
         for device in hconf:
             stream_id = device.attrib["name"]
-            num_bytes = int(device.attrib["numBytes"])
-            stream_bytes[stream_id] = packet_size
-            packet_size += num_bytes
+            if 'numBytes' in device.attrib.keys():
+               num_bytes = int(device.attrib["numBytes"])
+               stream_bytes[stream_id] = packet_size
+               packet_size += num_bytes
 
         # timestamps 4 uint32
         self._timestamp_byte = packet_size
@@ -139,7 +140,7 @@ def _parse_header(self):
                     # TODO LATER: deal with "headstageSensor" which have interleaved
                     continue
 
-                if channel.attrib["dataType"] == "analog":
+                if ('dataType' in channel.attrib.keys()) and (channel.attrib["dataType"] == "analog"):
 
                     if stream_id not in stream_ids:
                         stream_ids.append(stream_id)