McGrath scheck mods

SCCS-file: scheck.c
SCCS-SID: 8.17

scheck.c

@@ -8,20 +8,19 @@ static char	elsieid[] = "%W%";
 
 #include "private.h"
 
-char *
+const char *
 scheck(string, format)
 const char * const	string;
-char * const		format;
+const char * const	format;
 {
 	register char *		fbuf;
 	register const char *	fp;
 	register char *		tp;
 	register int		c;
-	register char *		result;
+	register const char *	result;
 	char			dummy;
-	static char		nada;
 
-	result = &nada;
+	result = "";
 	if (string == NULL || format == NULL)
 		return result;
 	fbuf = imalloc((int) (2 * strlen(format) + 4));