Bug 89020 [Undo] Operation throws assertion failure if undo limit is set to 0
I20050324-0800 Unfortunately existing clients of text's undo manager were allowed to set any number without failing. This is no longer possible: an assertion failure occurrs if the limit is smaller than 1. I will add code on my side that will handle the negative numbers but the operation history must allow 0.
bundles/org.eclipse.core.commands/src/org/eclipse/core/commands/operations/DefaultOperationHistory.java
if (status.isOK()) {
			undoList.remove(operation);
			
			 
			
			
			 
			
			if (operation.canRedo()) {
				checkRedoLimit(operation);
				redoList.add(operation);
			}
			
			
			notifyUndone(operation);
		} else {
			notifyNotOK(operation);
			if (flushOnError && status.getSeverity() == IStatus.ERROR) {
				remove(operation);
			}
		}
		return status;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.core.commands.operations.IOperationHistory#execute(org.eclipse.core.commands.operations.IUndoableOperation, org.eclipse.core.runtime.IProgressMonitor, org.eclipse.core.runtime.IAdaptable)
	 */