There's no use for the values set through the various macro calls
 (fbGetDrawable and fbGetDrawablePixmap), so mark those variables as unused.

 The following warnings go away accordingly:
 |   CC     libfb_la-fb24_32.lo
 | fb24_32.c: In function 'fb24_32ReformatTile':
 | fb24_32.c:544:19: warning: variable 'newYoff' set but not used [-Wunused-but-set-variable]
 | fb24_32.c:544:10: warning: variable 'newXoff' set but not used [-Wunused-but-set-variable]
 | fb24_32.c:543:19: warning: variable 'oldYoff' set but not used [-Wunused-but-set-variable]
 | fb24_32.c:543:10: warning: variable 'oldXoff' set but not used [-Wunused-but-set-variable]
 |   CC     libfb_la-fbfill.lo
 | fbfill.c: In function 'fbFill':
 | fbfill.c:72:21: warning: variable 'stipYoff' set but not used [-Wunused-but-set-variable]
 | fbfill.c:72:11: warning: variable 'stipXoff' set but not used [-Wunused-but-set-variable]
 | fbfill.c:100:21: warning: variable 'stipYoff' set but not used [-Wunused-but-set-variable]
 | fbfill.c:100:11: warning: variable 'stipXoff' set but not used [-Wunused-but-set-variable]
 | fbfill.c:142:20: warning: variable 'tileYoff' set but not used [-Wunused-but-set-variable]
 | fbfill.c:142:10: warning: variable 'tileXoff' set but not used [-Wunused-but-set-variable]
 |   CC     libfb_la-fbgc.lo
 | fbgc.c: In function 'fbPadPixmap':
 | fbgc.c:92:19: warning: variable 'yOff' set but not used [-Wunused-but-set-variable]
 | fbgc.c:92:13: warning: variable 'xOff' set but not used [-Wunused-but-set-variable]
 | fbgc.c: In function 'fbCanEvenStipple':
 | fbgc.c:166:23: warning: variable 'stipYoff' set but not used [-Wunused-but-set-variable]
 | fbgc.c:166:13: warning: variable 'stipXoff' set but not used [-Wunused-but-set-variable]
 |   CC     libfb_la-fbpush.lo
 | fbpush.c: In function 'fbPushPixels':
 | fbpush.c:238:20: warning: variable 'stipYoff' set but not used [-Wunused-but-set-variable]
 | fbpush.c:238:10: warning: variable 'stipXoff' set but not used [-Wunused-but-set-variable]
Reviewed-by: Jeremy Huddleston <jeremyhu@apple.com>
Signed-off-by: Cyril Brulebois <kibi@debian.org>
 Backport to nx-libs: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>