indent(1): Fix breakage caused by single comment following "else".

indent(1) simply wasn't taught that "else" may be followed by a comment
without any opening brace anywhere on the line, so it was very confused
in such cases.

Differential Revision: https://reviews.freebsd.org/D6966 (Partial)
Obtained from:	Piotr Stefaniak

usr.bin/indent/indent.c

@@ -319,6 +319,8 @@ main(int argc, char **argv)
 	    switch (type_code) {
 	    case newline:
 		++line_no;
+		if (sc_end != NULL)
+		    goto sw_buffer;	/* dump comment, if any */
 		flushed_nl = true;
 	    case form_feed:
 		break;		/* form feeds and newlines found here will be