tjctx->tagStackPtr == MAXTAGDEPTH causes array overrun. Found by Coverity.
tjctx->tagStackPtr == MAXTAGDEPTH causes array overrun.
Found by Coverity.

zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb