trovatag()

int trovatag	(	int	phytag,
		int *	indice
	)

                                     {                                                                  // gp
        int i, num;
        struct gmsh_bc* gmshbc;

        if(NULL != multif){
                num = nphystags*modsolinfo->nome;
        }else{
                num = nphystags;
        }

        for(i=0; i<num; i++){
                gmshbc = (struct gmsh_bc*) phystags[i].ptrgmshbc;
                //logger(LOG_DEBUG,"tag confronto %d = %d\n", phytag, gmshbc->tag);
                if(phytag == gmshbc->tag){
                        *indice = i;
                        return 1;
                }
        }
        return -1; // error: no matching tag
}