vi: add new phoneme for N

phsource/ph_vietnam

@@ -512,13 +512,13 @@ phoneme k
 endphoneme
 
 phoneme N // si**ng** 
-  vcd vel nas
+  vcd lbv nas
   Vowelout f1=3 f2=2300 300 400  f3=-200 80  len=40 rms=20 brk
   lengthmod 12            // longer than 'n'
   IF prevPhW(isVowel) AND prev2PhW(isVowel) THEN
 	length 160
   ENDIF
-  FMT(n/nr_)
+  FMT(n/nm)
 endphoneme
 
 phoneme l