riched20: Reject RTF that is recognized as invalid.
[wine] / dlls / wineaudioio.drv /
drwxr-xr-x   ..
-rw-r--r-- 323 Makefile.in
-rw-r--r-- 71291 audio.c
-rw-r--r-- 2535 audioio.c
-rw-r--r-- 156 wineaudioio.drv.spec