private void findNextRange() {
			while (it.hasNext()) {
				nextRange = it.next();
				RegisterValue bytes = getRegisterValue(register, nextRange.getMinAddress(), map);
				if (bytes != null && bytes.hasAnyValue()) {
					return;
				}
			}
			nextRange = null;
		}
if the address is in an overlay and we are getting the default value, then get the default
value from the base space, not the overlay space.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/util/AbstractStoredProgramContext.java