Fixing a few less common issues from the Market console.

MyTracks/src/com/google/android/apps/mytracks/MapOverlay.java

@@ -15,6 +15,8 @@
  */
 package com.google.android.apps.mytracks;
 
+import static com.google.android.apps.mytracks.Constants.TAG;
+
 import com.google.android.apps.mytracks.content.Waypoint;
 import com.google.android.apps.mytracks.util.LocationUtils;
 import com.google.android.maps.GeoPoint;
@@ -33,6 +35,7 @@ import android.graphics.Point;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
 import android.location.Location;
+import android.util.Log;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -235,6 +238,11 @@ public class MapOverlay extends Overlay {
 
     // It's safe to keep projection within a single draw operation.
     final Projection projection = getMapProjection(mapView);
+    if (projection == null) {
+      Log.w(TAG, "No projection, unable to draw");
+      return;
+    }
+
     // Get the current viewing window.
     if (trackDrawingEnabled) {
       Rect viewRect = getMapViewRect(mapView);

MyTracks/src/com/google/android/apps/mytracks/content/TrackDataHub.java

@@ -989,6 +989,7 @@ public class TrackDataHub {
         // no matter how many points we get in the newest batch, we'll never exceed
         // MAX_DISPLAYED_TRACK_POINTS = 2 * TARGET_DISPLAYED_TRACK_POINTS before resampling.
         long numTotalPoints = lastStoredLocationId - localFirstSeenLocationId;
+        numTotalPoints = Math.max(0L, numTotalPoints);
         pointSamplingFrequency = (int) (1 + numTotalPoints / targetNumPoints);
       }
 

MyTracks/src/com/google/android/apps/mytracks/services/tasks/FroyoStatusAnnouncerTask.java

@@ -59,7 +59,8 @@ public class FroyoStatusAnnouncerTask extends StatusAnnouncerTask {
   @Override
   protected void onTtsInit(int status) {
     super.onTtsInit(status);
-    if (status == TextToSpeech.SUCCESS) {
+
+    if (status == TextToSpeech.SUCCESS && tts != null) {
       tts.setOnUtteranceCompletedListener(utteranceListener);
     }
   }