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Simplify mkdefine

The type value of the format string of macros is not needed, because
we can use the value of number of arguments directly.

--- a/cc1/cpp.c

+++ b/cc1/cpp.c

@@ -115,17 +115,9 @@

 {

 	int nargs;

 	char *args[NR_MACROARG], buff[LINESIZ+1];

-	char type;

 	s = parseargs(s, args, &nargs);

-	if (nargs == -1) {

-		type = 'N';

-		++nargs;

-	} else {

-		type = 'P';

-	}

-

-	sprintf(buff, "%c%02d", type, nargs);

+	sprintf(buff, "%02d#", nargs);

 	while (isspace(*s))

 		++s;