GP-0: Fix rare race condition causing NPE.

Author: nsadeveloper789

Ghidra/Debug/Debugger/src/main/java/ghidra/app/plugin/core/debug/gui/model/AbstractQueryTableModel.java

@@ -4,9 +4,9 @@
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- * 
+ *
  *      http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -302,6 +302,7 @@ public boolean isShowHidden() {
 	@Override
 	protected void doLoad(Accumulator<T> accumulator, TaskMonitor monitor)
 			throws CancelledException {
+		Trace trace = this.trace;
 		if (trace == null || query == null || trace.getObjectManager().getRootSchema() == null) {
 			return;
 		}