public boolean isStackDepthValid() {
		if (getStackDepthChange() > 0xffffff) {
			return false;
		}
		return true;
	}
@see ghidra.program.model.listing.Function#getStackPurgeSize()
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/oldfunction/OldFunctionDataDB.java