fix error while serializing string with null value, fix gitadora skill>1000 issue

Author: GEEKiDoS

.gitignore

@@ -34,3 +34,4 @@ input.xml
 output.json
 dump.xml
 pdata.json
+dump.bin

src/controllers/gitadora/user.ts

@@ -185,7 +185,7 @@ export class User {
                 for (const seq in m.seqs) {
                   const rec = m.seqs[seq];
                   if (rec.skill > bestScore) {
-                    bestScore = rec.skill;
+                    bestScore = rec.skill % 10000;
                     bestSeq = +seq;
                   }
 

src/utils/kbinxml.ts

@@ -168,6 +168,10 @@ function serializeValue(value: any, type: string): string {
   }
 
   if (['str', 'string'].includes(type)) {
+    if (!value.replace) {
+      return 'null';
+    }
+
     return value.replace(/[<>&'"]/g, (ch: string) => {
       switch (ch) {
         case '<': return '&lt;';