Fix parsing of BitRate when there's no space separator in the string.

tools/python3/lib/rt_m1_client/types.py

@@ -566,7 +566,7 @@ def __ne__(self,  other: Union[int,float,"BitRate"]) -> bool:
 
     @staticmethod
     def __parseBitrateString(br: str) -> float:
-        val,units = br.split(' ',1)
+        val,units = (br.split(' ',1) + [None])[:2]
         val = float(val)
         if units not in ['bps', 'Kbps', 'Mbps', 'Gbps', 'Tbps', 'Pbps']:
             raise ValueError('BitRate string must have units of bps, Kbps, Mbps, Gbps, Tbps or Pbps')