scripts/Lindent: handle missing indent gracefully

If indent is not found, bail out immediately instead of spitting random
shell script error messages.
Signed-off-by: NJean Delvare <jdelvare@suse.de>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

scripts/Lindent

 #!/bin/sh
 PARAM="-npro -kr -i8 -ts8 -sob -l80 -ss -ncs -cp1"
 RES=`indent --version`
+if [ "$RES" = "" ]; then
+	exit 1
+fi
 V1=`echo $RES | cut -d' ' -f3 | cut -d'.' -f1`
 V2=`echo $RES | cut -d' ' -f3 | cut -d'.' -f2`
 V3=`echo $RES | cut -d' ' -f3 | cut -d'.' -f3`