Update doorscan.js - fix "TypeError: argv[i].toLowerCase is not a function"...

Update doorscan.js - fix "TypeError: argv[i].toLowerCase is not a function" when being called from webv4

xtrn/doorscan/doorscan.js

@@ -1204,6 +1204,7 @@ function doScan()
 }
 
 for(i in argv) {
+	if (typeof argv[i] == "String") {
 		switch(argv[i].toLowerCase()) {
 			case 'scan':
 				doScan();
@@ -1231,3 +1232,4 @@ for(i in argv) {
 				break;
 		}
 	}
+}