isvowel           236 ext/standard/metaphone.c 		} else if (isvowel(Next_Letter)) {
isvowel           368 ext/standard/metaphone.c 			if (isvowel(Next_Letter) &&
isvowel           434 ext/standard/metaphone.c 			if (isvowel(Next_Letter))
isvowel           444 ext/standard/metaphone.c 			if (isvowel(Next_Letter))