GP-4910 fix 'null' in convert menu -> signed hex on int data items

Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/equate/ConvertToSignedHexAction.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.
@@ -28,7 +28,9 @@ public class ConvertToSignedHexAction extends AbstractConvertAction {
 
 	@Override
 	protected String getMenuName(Program program, Scalar scalar, boolean isData) {
-		return getStandardLengthString("Signed Hex:") + convertToString(program, scalar, isData);
+		return isData
+				? null
+				: getStandardLengthString("Signed Hex:") + convertToString(program, scalar, false);
 	}
 
 	@Override