RDP_SCALE in winapps.conf breaking xfreerdp command

When my winapps.conf file is this (with an RDP_SCALE set)...
```python
RDP_USER="..."
RDP_PASS="..."
#RDP_DOMAIN="MYDOMAIN"
#RDP_IP="192.168.123.111"
RDP_SCALE=200
#RDP_FLAGS="/audio-mode:1"
#MULTIMON="true"
#DEBUG="true"
```
...`bin/winapps check` fails and prints how to use the xfreerdp command:
```
FreeRDP - A Free Remote Desktop Protocol Implementation
See www.freerdp.com for more information

Usage: xfreerdp [file] [options] [/v:[:port]]

Syntax:
/flag (enables flag)
/option: (specifies option with value)
+toggle -toggle (enables or disables toggle, where '/' is a synonym of '+')
```

#

This doesn't happen when I comment out the `RDP_SCALE` line.