Fix for code to catch condition that causes bug 276259.

build/package/mac_osx/make-diskimage

@@ -93,7 +93,7 @@ MOUNT_DIR=`hdid $DMG_TEMP_NAME | grep Apple_HFS | awk '{print $3}'`
 echo "copying content to disk image"
 ditto -rsrcFork $SRC_FOLDER $MOUNT_DIR
 rc=$?
-if [ $rc ne 0 ]; then
+if [ $rc != "0" ]; then
 	echo "ERROR: 'ditto -rsrcFork $SRC_FOLDER $MOUNT_DIR' failed ($rc)"
 	exit 1
 fi