Check for media service being present before capture.

  Bug: 11508325

Change-Id: I0997f9bff63b1cdb3c33272acc8617b30c07424a
diff --git a/src/com/android/camera/PhotoModule.java b/src/com/android/camera/PhotoModule.java
index 09d5dc6..ed13aa5 100644
--- a/src/com/android/camera/PhotoModule.java
+++ b/src/com/android/camera/PhotoModule.java
@@ -869,6 +869,7 @@
         // is full then ignore.
         if (mCameraDevice == null || mCameraState == SNAPSHOT_IN_PROGRESS
                 || mCameraState == SWITCHING_CAMERA
+                || mActivity.getMediaSaveService() == null
                 || mActivity.getMediaSaveService().isQueueFull()) {
             return false;
         }