Use Int32 for the contact list buffer

libloki/api.js

@@ -114,7 +114,7 @@
     buffers.forEach(buffer => {
       // bytebuffer container expands and increments
       // offset automatically
-      result.writeVarint32(buffer.limit);
+      result.writeInt32(buffer.limit);
       result.append(buffer);
     });
     result.limit = result.offset;

libtextsecure/contacts_parser.js

@@ -14,7 +14,7 @@ ProtoParser.prototype = {
       if (this.buffer.limit === this.buffer.offset) {
         return undefined; // eof
       }
-      const len = this.buffer.readVarint32();
+      const len = this.buffer.readInt32();
       const nextBuffer = this.buffer
         .slice(this.buffer.offset, this.buffer.offset + len)
         .toArrayBuffer();

libtextsecure/test/contacts_parser_test.js

@@ -18,7 +18,7 @@ describe('ContactBuffer', () => {
     const contactInfoBuffer = contactInfo.encode().toArrayBuffer();
 
     for (let i = 0; i < 3; i += 1) {
-      buffer.writeVarint32(contactInfoBuffer.byteLength);
+      buffer.writeInt32(contactInfoBuffer.byteLength);
       buffer.append(contactInfoBuffer);
       buffer.append(avatarBuffer.clone());
     }
@@ -69,7 +69,7 @@ describe('GroupBuffer', () => {
     const groupInfoBuffer = groupInfo.encode().toArrayBuffer();
 
     for (let i = 0; i < 3; i += 1) {
-      buffer.writeVarint32(groupInfoBuffer.byteLength);
+      buffer.writeInt32(groupInfoBuffer.byteLength);
       buffer.append(groupInfoBuffer);
       buffer.append(avatarBuffer.clone());
     }