SC2155: Declare and assign separately to avoid masking return values.

In the original code, the return value of mycmd is ignored, and export
will instead always return true. This may prevent conditionals, set -e
and traps from working correctly.

PR:		227109
Submitted by:	mat
Sponsored by:	Absolight

Mk/Scripts/smart_makepatch.sh

@@ -276,7 +276,8 @@ conserve_old_patches() {
 }
 
 install_regenerated_patches() {
-	local testdir=$(find ${DESTDIR} -empty)
+	local testdir
+	testdir=$(find ${DESTDIR} -empty)
 	if [ -z "${testdir}" ]; then
 		mkdir -p ${PATCHDIR}
 		find ${DESTDIR} -type f -exec mv {} ${PATCHDIR}/ \;