public void addGotoRef(PcodeBlock gblock, int root, int depth) {
		GotoReference ref = new GotoReference(gblock, root, depth);
		gotoreflist.add(ref);
	}
Assume blocks are in index order, find the block with index -ind-
@param ind is the block index to match
@return the matching PcodeBlock
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/pcode/BlockMap.java