[PATCH] nvidiafb: Fix empty macro

Use do {} while(0) for empty reverse_order() macro.

Signed-off-by: Antonino Daplas <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/video/nvidia/nv_local.h

···
 	*a = byte_rev[*a];      \
 } while(0)
 #else
-#define reverse_order(l)
+#define reverse_order(l) do { } while(0)
 #endif                          /* __LITTLE_ENDIAN */
 
 #endif				/* __NV_LOCAL_H__ */