wincred: accept CRLF on stdin to simplify console usage

The windows credential helper currently only accepts LF on stdin, but bash
and cmd.exe both send CRLF. This prevents interactive use in the console.

Change the stdin parser to optionally accept CRLF.

Signed-off-by: Karsten Blees <blees@dcon.de>
Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>

contrib/credential/wincred/git-credential-wincred.c

@@ -284,10 +284,13 @@ static void read_credential(void)
 
 	while (fgets(buf, sizeof(buf), stdin)) {
 		char *v;
+		int len = strlen(buf);
+		/* strip trailing CR / LF */
+		while (len && strchr("\r\n", buf[len - 1]))
+			buf[--len] = 0;
 
-		if (!strcmp(buf, "\n"))
+		if (!*buf)
 			break;
-		buf[strlen(buf)-1] = '\0';
 
 		v = strchr(buf, '=');
 		if (!v)