sdremote: unwind a couple of crasher / corner cases

android/sdremote/src/org/libreoffice/impressremote/PresentationActivity.java

@@ -349,17 +349,12 @@ public class PresentationActivity extends SherlockFragmentActivity {
             @Override
             public void run() {
                 CharSequence aTimeString;
-                long aTime = mCommunicationService.getSlideShow().getTimer()
-                                .getTimeMillis();
-                if (mTimerOn) {
-                    aTimeString = DateFormat.format(aTimerFormat, aTime);
-                } else {
-                    aTimeString = DateFormat.format(aTimeFormat,
-                                    System.currentTimeMillis());
-                }
+		long aTime = System.currentTimeMillis();
+		if (mTimerOn && mCommunicationService != null)
+		    aTime = mCommunicationService.getSlideShow().getTimer().getTimeMillis();
+		aTimeString = DateFormat.format(aTimerFormat, aTime);
                 mTimeLabel.setText(aTimeString);
                 timerHandler.postDelayed(this, 50);
-
             }
 
         };

android/sdremote/src/org/libreoffice/impressremote/SelectorActivity.java

@@ -130,7 +130,8 @@ public class SelectorActivity extends SherlockActivity {
 
     @Override
     public void onBackPressed() {
-        mCommunicationService.stopSearching();
+        if (mCommunicationService != null)
+            mCommunicationService.stopSearching();
         Intent aIntent = new Intent(this, CommunicationService.class);
         stopService(aIntent);
         super.onBackPressed();
@@ -325,4 +326,4 @@ public class SelectorActivity extends SherlockActivity {
         return super.onContextItemSelected(item);
     }
 }
-/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
\ No newline at end of file
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */