Avoid side effects in putc(), which may be implemented as a macro

Signed-off-by: Dan Fandrich <dan@coneharvesters.com>
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>

coreutils/ls.c

@@ -573,7 +573,8 @@ static unsigned print_name(const char *name)
 			putchar('\\');
 			len++;
 		}
-		putchar(*name++);
+		putchar(*name);
+		name++;
 	}
 	putchar('"');
 	return len;