FELIX-4402 avoid some NPEs if for some reason the deleted config is not actually associated with a component manager

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@1602637 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/scr/src/main/java/org/apache/felix/scr/impl/config/ConfigurableComponentHolder.java b/scr/src/main/java/org/apache/felix/scr/impl/config/ConfigurableComponentHolder.java
index bf39d2a..bc43e41 100644
--- a/scr/src/main/java/org/apache/felix/scr/impl/config/ConfigurableComponentHolder.java
+++ b/scr/src/main/java/org/apache/felix/scr/impl/config/ConfigurableComponentHolder.java
@@ -244,7 +244,7 @@
 				{
 					m_factoryPidIndex = null;
 				}
-				if ( !m_enabled )
+				if ( !m_enabled || scm == null )
 				{
 					return;
 				}
@@ -274,14 +274,13 @@
 
 				if ( m_factoryPidIndex == null)
 				{
-					if ( reconfigure)
-					{
-						scms.put(m_singleComponent, mergeProperties( null ));
-					}
-					else
-					{
-						scms.put( m_singleComponent, null);
-						m_singleComponent = null;
+					if ( m_singleComponent != null ) {
+						if (reconfigure) {
+							scms.put(m_singleComponent, mergeProperties(null));
+						} else {
+							scms.put(m_singleComponent, null);
+							m_singleComponent = null;
+						}
 					}
 				}
 				else