private void refreshLength() {
		length = proto.getLength();
		lengthOverride = (flags & LENGTH_OVERRIDE_SET_MASK) >> LENGTH_OVERRIDE_SHIFT;
		if (lengthOverride != 0 && lengthOverride < length) {
			length = lengthOverride;
		}
		else {
			lengthOverride = 0;
		}
	}
Construct a new InstructionDB.
@param codeMgr code manager
@param cache code unit cache
@param address min address of this instruction
@param addr database key
@param proto instruction prototype
@param flags flow override flags
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/code/InstructionDB.java