Tidied code

Source/NSInvocationOperation.m

@@ -41,22 +41,24 @@
   if (((self = [super init])) != nil)
     {
       [inv retainArguments];
-      _invocation = [inv retain];
+      _invocation = RETAIN(inv);
     }
   return self;
 }
 
 - (id) initWithTarget: (id)target selector: (SEL)aSelector object: (id)arg
 {
-  NSMethodSignature *methodSignature;
-  NSInvocation *inv;
+  NSMethodSignature	*methodSignature;
+  NSInvocation		*inv;
 
   methodSignature = [target methodSignatureForSelector: aSelector];
   inv = [NSInvocation invocationWithMethodSignature: methodSignature];
   [inv setTarget: target];
   [inv setSelector: aSelector];
   if ([methodSignature numberOfArguments] > 2)
-    [inv setArgument: &arg atIndex: 2];
+    {
+      [inv setArgument: &arg atIndex: 2];
+    }
   return [self initWithInvocation: inv];
 }
 
@@ -65,16 +67,20 @@
   if (![self isCancelled])
     {
       NS_DURING
-	[_invocation invoke];
+	{
+	  [_invocation invoke];
+	}
       NS_HANDLER
-	_exception = [localException copy];
+	{
+	  ASSIGN(_exception, localException);
+	}
       NS_ENDHANDLER
     }
 }
 
 - (NSInvocation *) invocation
 {
-  return [[_invocation retain] autorelease];
+  return AUTORELEASE(RETAIN(_invocation));
 }
 
 - (id) result
@@ -123,8 +129,8 @@
 
 - (void) dealloc
 {
-  [_invocation release];
-  [_exception release];
+  DESTROY(_invocation);
+  DESTROY(_exception);
   [super dealloc];
 }