build warning

a recent patch triggered a new warning:
cmd.c(995) : warning C4101: 'numbuf' : unreferenced local variable

src/cmd.c

@@ -992,7 +992,6 @@ const char *inctyp;
 int incamt, final;
 char *outbuf;
 {
-	char numbuf[24];
 	const char *modif, *bonus;
 	boolean invrt;
 	int absamt;