Bogusness may have happened using a variable assignment here before, but

proper parens mean that fd is always set by open(2) [in any part of C],
and so we can accurately check for it returning -1, without feeling like
we need to initialise fd to -1 in its declaration.

In other words, fix a stylistic/bogus nit.

bin/ed/buf.c

@@ -193,7 +193,7 @@ char sfn[15] = "";				/* scratch file name */
 int
 open_sbuf(void)
 {
-	int fd = -1;
+	int fd;
 	int u;
 
 	isbinary = newline_added = 0;