fix service request host link null check

TSMatchMobileApp/android/app/build.gradle

@@ -114,7 +114,7 @@ def jscFlavor = 'org.webkit:android-jsc:+'
 /**
  * Whether to enable the Hermes VM.
  *
- * This should be set on project.ext.react and mirrored here.  If it is not set
+ * This should be set on project.ext.reacts and mirrored here.  If it is not set
  * on project.ext.react, JavaScript will not be compiled to Hermes Bytecode
  * and the benefits of using Hermes will therefore be sharply reduced.
  */
@@ -132,7 +132,7 @@ android {
         applicationId "com.tsmatchapp"
         minSdkVersion rootProject.ext.minSdkVersion
         targetSdkVersion rootProject.ext.targetSdkVersion
-        versionCode 4
+        versionCode 5
         versionName "1.2"
         multiDexEnabled true
     }

TSMatchMobileApp/src/scene/Describe.js

@@ -125,7 +125,7 @@ class Describe extends React.Component {
     submit = async () => {
         let requestList = [];
         if (this.state.serviceRequestViaLink) {
-            if (!this.state.serviceRequestHost || !this.state.serviceRequestPort) {
+            if (this.state.serviceRequestHost == null || this.state.serviceRequestPort == null) {
                 ToastAndroid.showWithGravityAndOffset(this.props.messages.fillAllPlacesError, ToastAndroid.LONG, ToastAndroid.TOP, 0, 0)
                 return;
             }