Don't do initialization that requires the shared application object/backend too early (ie. move it from +initialize to other methods). Add some asserts to try to catch these errors in the future.

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@17503 72102866-910b-0410-8b05-ffd578937521

Source/NSTextView.m

@@ -375,19 +375,23 @@ this happens when layout has been invalidated, and when we are resized.
     {
       [self setVersion: currentVersion];
       notificationCenter = [NSNotificationCenter defaultCenter];
-      [self registerForServices];
     }
 }
 
+static BOOL did_register_for_services;
+
 +(void) registerForServices
 {
   NSArray *types;
-      
+
+  did_register_for_services = YES;
+
   types = [NSArray arrayWithObjects: NSStringPboardType,
 		    NSRTFPboardType, NSRTFDPboardType, nil];
- 
-  [[NSApplication sharedApplication] registerServicesMenuSendTypes: types
-						       returnTypes: types];
+
+  NSAssert(NSApp, @"Called before the shared application object was created.");
+  [NSApp registerServicesMenuSendTypes: types
+			   returnTypes: types];
 }
 
 +(NSDictionary *) defaultTypingAttributes
@@ -474,6 +478,9 @@ If a text view is added to an empty text network, it keeps its attributes.
   if (!self)
     return nil;
 
+  if (!did_register_for_services)
+    [isa registerForServices];
+
   _minSize = NSMakeSize(0, 0);
   _maxSize = NSMakeSize(HUGE,HUGE);
   _textContainerInset = NSMakeSize(2, 0);