Support float values for --partsize with M or G suffix

ia-upload-stream

@@ -310,9 +310,9 @@ def main():
 		except ValueError:
 			pass
 		if x.endswith('M'):
-			return int(x[:-1]) * 1024 ** 2
+			return int(float(x[:-1]) * 1024 ** 2)
 		elif x.endswith('G'):
-			return int(x[:-1]) * 1024 ** 3
+			return int(float(x[:-1]) * 1024 ** 3)
 		raise ValueError
 
 	def parts(x):