libweston/compositor-rdp: fix no-break space U+A0 (U8+C2A0)
libweston/compositor-rdp: fix no-break space U+A0 (U8+C2A0)

There is a UTF-8 no-break space (U+A0, U8+C2A0) in the definition of
macro NSC_RESET in the case of  1.2.2 <= FreeRDP < 2.0.

This is causing build issues (\302 is 0xC2, \240 is 0xA0):
    http://autobuild.buildroot.net/results/f49/f49a9cbb7bdc5d9e05dcf0a20bd83f059e234e74/build-end.log

Fix that by using a plain, boring space U+20.

Signed-off-by: "Yann E. MORIN" <b375a36861a21dce61868a5a9b415811d17b4e97@free.fr>
Reviewed-by: Yong Bakos <d0d6c2a9047d8c98cd8ce1e9b46eb851dcd10a82@humanoriented.com>

sir-murray/weston,krezovic/weston,krezovic/weston,sir-murray/weston