Use correct length when prompting for password.

Use bufsiz - 1 not BUFSIZ - 1 when prompting for a password in
the openssl utility.

Thanks to Rob Mackinnon, Leviathan Security for reporting this issue.

apps/apps.c

@@ -588,12 +588,12 @@ int password_callback(char *buf, int bufsiz, int verify,
 
 		if (ok >= 0)
 			ok = UI_add_input_string(ui,prompt,ui_flags,buf,
-				PW_MIN_LENGTH,BUFSIZ-1);
+				PW_MIN_LENGTH,bufsiz-1);
 		if (ok >= 0 && verify)
 			{
 			buff = (char *)OPENSSL_malloc(bufsiz);
 			ok = UI_add_verify_string(ui,prompt,ui_flags,buff,
-				PW_MIN_LENGTH,BUFSIZ-1, buf);
+				PW_MIN_LENGTH,bufsiz-1, buf);
 			}
 		if (ok >= 0)
 			do