Fix crash when accessibility is on

Bug: 6600699
Change-Id: I9eb8b9871d1368bd7508873951d5719e1f2ba826
diff --git a/src/com/android/settings/wifi/WifiConfigController.java b/src/com/android/settings/wifi/WifiConfigController.java
index 6bf4259..2598a0e 100644
--- a/src/com/android/settings/wifi/WifiConfigController.java
+++ b/src/com/android/settings/wifi/WifiConfigController.java
@@ -743,7 +743,9 @@
                     InputType.TYPE_CLASS_TEXT | (((CheckBox) view).isChecked() ?
                             InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD :
                                 InputType.TYPE_TEXT_VARIATION_PASSWORD));
-            ((EditText)mPasswordView).setSelection(pos);
+            if (pos >= 0) {
+                ((EditText)mPasswordView).setSelection(pos);
+            }
         } else if (view.getId() == R.id.wifi_advanced_togglebox) {
             if (((CheckBox) view).isChecked()) {
                 mView.findViewById(R.id.wifi_advanced_fields).setVisibility(View.VISIBLE);