DATAMONGO-1725 - Prevent NullPointerException in CloseableIterableCursorAdapter.close().

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/MongoTemplate.java

@@ -2488,7 +2488,11 @@ public class MongoTemplate implements MongoOperations, ApplicationContextAware {
 
 			Cursor c = cursor;
 			try {
-				c.close();
+
+				if (c != null) {
+					c.close();
+				}
+
 			} catch (RuntimeException ex) {
 				throw potentiallyConvertRuntimeException(ex, exceptionTranslator);
 			} finally {