Fix print message

install/calculate

@@ -5297,8 +5297,8 @@ sub createiso{
 	isotosys();
 
 	#delete old squashfs
-	printmes("  ".gettext('Removing old image of system')); printmes("...");
 	if(defined $data{arg}{rebuild} && $data{squash_del}){
+		printmes("  ".gettext('Removing old image of system')); printmes("...");
 		if(system("rm /mnt/flash/$data{squash_del}")){
 			printmes(" ".gettext('error').".\n");
 			breakiso();