Fix notification usage.

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@4410 72102866-910b-0410-8b05-ffd578937521

Source/NSConnection.m

@@ -903,6 +903,7 @@ static int messages_received_count;
 		       outPort: (NSPort*)op
 	    ancestorConnection: (NSConnection*)ancestor
 {
+  NSNotificationCenter	*nCenter;
   NSConnection		*newConn;
 
   NSParameterAssert (ip);
@@ -1034,12 +1035,13 @@ static int messages_received_count;
 
   /* Register ourselves for invalidation notification when the
      ports become invalid. */
-  [NSNotificationCenter addObserver: newConn
+  nCenter = [NSNotificationCenter defaultCenter];
+  [nCenter addObserver: newConn
 	      selector: @selector(portIsInvalid:)
 		  name: NSPortDidBecomeInvalidNotification
 		object: ip];
   if (op)
-    [NSNotificationCenter addObserver: newConn
+    [nCenter addObserver: newConn
 		selector: @selector(portIsInvalid:)
 		    name: NSPortDidBecomeInvalidNotification
 		  object: op];

Source/NSPortNameServer.m

@@ -787,6 +787,7 @@ static NSPortNameServer	*defaultServer = nil;
 
 - (void) _open: (NSString*)host
 {
+  NSNotificationCenter *nc;
   NSRunLoop	*loop;
   NSString	*hostname = host;
   BOOL		isLocal = NO;
@@ -870,15 +871,16 @@ static NSPortNameServer	*defaultServer = nil;
 
   expecting = 1;
   [handle retain];
-  [NSNotificationCenter addObserver: self
+  nc = [NSNotificationCenter defaultCenter];
+  [nc addObserver: self
 	 selector: @selector(_didConnect:)
 	     name: GSFileHandleConnectCompletionNotification
 	   object: handle];
-  [NSNotificationCenter addObserver: self
+  [nc addObserver: self
 	 selector: @selector(_didRead:)
 	     name: NSFileHandleReadCompletionNotification
 	   object: handle];
-  [NSNotificationCenter addObserver: self
+  [nc addObserver: self
 	 selector: @selector(_didWrite:)
 	     name: GSFileHandleWriteCompletionNotification
 	   object: handle];

Source/NSSerializer.m

@@ -698,7 +698,7 @@ deserializeFromInfo(_NSDeserializerInfo* info)
 	}
       else
 	{
-	  [NSNotificationCenter
+	  [[NSNotificationCenter defaultCenter]
 	    addObserver: self
 	       selector: @selector(_becomeThreaded:)
 		   name: NSWillBecomeMultiThreadedNotification