isvowel           235 ext/standard/metaphone.c 		} else if (Next_Letter == 'H' || isvowel(Next_Letter)) {
isvowel           367 ext/standard/metaphone.c 			if (isvowel(Next_Letter) &&
isvowel           433 ext/standard/metaphone.c 			if (isvowel(Next_Letter))
isvowel           443 ext/standard/metaphone.c 			if (isvowel(Next_Letter))