Add support for WiFi tethering: allow no password.

Change-Id: I91690886fc44eddaff5882283439c50ae3ee71cb
diff --git a/Common/src/com/googlecode/android_scripting/facade/wifi/WifiManagerFacade.java b/Common/src/com/googlecode/android_scripting/facade/wifi/WifiManagerFacade.java
index f233e0f..99ef3f2 100755
--- a/Common/src/com/googlecode/android_scripting/facade/wifi/WifiManagerFacade.java
+++ b/Common/src/com/googlecode/android_scripting/facade/wifi/WifiManagerFacade.java
@@ -739,7 +739,7 @@
     public Boolean wifiIsScannerSupported() {
         return mWifi.isWifiScannerSupported();
     }
-    
+
     @Rpc(description = "Check if tdls is supported on this device.")
     public Boolean wifiIsTdlsSupported() {
         return mWifi.isTdlsSupported();
@@ -819,7 +819,7 @@
                 config.SSID = ssid.substring(1, ssid.length() - 1);
             }
             String pwd = config.preSharedKey;
-            if (ssid != null) {
+            if (pwd != null) {
                 config.preSharedKey = pwd.substring(1, pwd.length() - 1);
             }
             return mWifi.setWifiApEnabled(config, enable);