OmniGears: fix ClassCastException on config battery lights color

Change-Id: I9ade9f5350e50248fc6d697ddcfb1ea232f6fcaf
diff --git a/src/org/omnirom/omnigears/batterylight/BatteryLightSettings.java b/src/org/omnirom/omnigears/batterylight/BatteryLightSettings.java
index dad2d07..3f4d45c 100644
--- a/src/org/omnirom/omnigears/batterylight/BatteryLightSettings.java
+++ b/src/org/omnirom/omnigears/batterylight/BatteryLightSettings.java
@@ -212,11 +212,12 @@
 
     @Override
     public boolean onPreferenceChange(Preference preference, Object objValue) {
-        boolean value = (Boolean) objValue;
         if (preference == mEnabledPref) {
+            boolean value = (Boolean) objValue;
             Settings.System.putInt(getActivity().getContentResolver(),
                     Settings.System.BATTERY_LIGHT_ENABLED, value ? 1:0);
         } else if (preference == mPulsePref) {
+            boolean value = (Boolean) objValue;
             Settings.System.putInt(getActivity().getContentResolver(),
                     Settings.System.BATTERY_LIGHT_PULSE, value ? 1:0);
         } else {