support: MasterSwitchPreference: isChecked doesn't rely on existence of switch

When checking for isChecked in e.g. a preferenceFragment, we want to
know the setting value, independent of whether the preference already
has been inflated or not

Change-Id: Ie3e777388805d329fea6f56ef306a4c941993938
diff --git a/src/com/bliss/support/preferences/MasterSwitchPreference.java b/src/com/bliss/support/preferences/MasterSwitchPreference.java
index 1bd1f35..d4374ec 100644
--- a/src/com/bliss/support/preferences/MasterSwitchPreference.java
+++ b/src/com/bliss/support/preferences/MasterSwitchPreference.java
@@ -87,7 +87,7 @@
     }
 
     public boolean isChecked() {
-        return mSwitch != null && mSwitch.isEnabled() && mChecked;
+        return mChecked;
     }
 
     public void setChecked(boolean checked) {