fixed few minor issues

lib/command_line.sh

@@ -140,7 +140,7 @@ read_commandline()
 	syntax_error
     fi
 
-    unset want_conffile want_logfile want_module
+    unset want_conffile want_logfile want_module want_chroot
 }
 export -f read_commandline
 
@@ -165,8 +165,8 @@ process_commandline_and_vars()
 	    prnt E "Resuming doesn't make sense with --check-only."
 	    die 1 --force
 	fi
-	if [[ $MANUAL_MODULE_LIST ]]; then
-	    prnt E "Recovery mode can't work with a manual module list."
+	if [[ -n $MANUAL_MODULE_LIST ]]; then
+	    prnt E "Resume mode can't work with a manual module list."
 	    die 1 --force
 	fi
     fi