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" <yann.morin.1998@free.fr>
Reviewed-by: Yong Bakos <ybakos@humanoriented.com>

libweston/compositor-rdp.c

@@ -58,7 +58,7 @@
 #	define NSC_RESET(C, W, H) nsc_context_reset(C, W, H)
 #	define RFX_RESET(C, W, H) rfx_context_reset(C, W, H)
 #else
-#	define NSC_RESET(C, W, H) do { nsc_context_reset(C); C->width = W; C->height = H; } while(0)
+#	define NSC_RESET(C, W, H) do { nsc_context_reset(C); C->width = W; C->height = H; } while(0)
 #	define RFX_RESET(C, W, H) do { rfx_context_reset(C); C->width = W; C->height = H; } while(0)
 #endif
 #define FREERDP_CB_RET_TYPE BOOL