SLING-3793 : Field in MimeTypeServiceImpl must be declared volatile

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1613877 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/main/java/org/apache/sling/commons/mime/internal/MimeTypeServiceImpl.java b/src/main/java/org/apache/sling/commons/mime/internal/MimeTypeServiceImpl.java
index 9983bdf..305aafc 100644
--- a/src/main/java/org/apache/sling/commons/mime/internal/MimeTypeServiceImpl.java
+++ b/src/main/java/org/apache/sling/commons/mime/internal/MimeTypeServiceImpl.java
@@ -65,7 +65,7 @@
     private static final String PROP_MIME_TYPES = "mime.types";
 
     @Reference(cardinality=ReferenceCardinality.OPTIONAL_UNARY, policy=ReferencePolicy.DYNAMIC)
-    private LogService logService;
+    private volatile LogService logService;
 
     private Map<String, String> mimeTab = new HashMap<String, String>();