Fixed some style bugs:

- ifdefs around vendor sccsid were left reversed after switching to
  __FBSDID().
- vertical whitespace after some of the non-FALLTHROUGH cases was lost.
- too much vertical whitespace before prototypes.

usr.bin/msgs/msgs.c

@@ -37,11 +37,11 @@ static const char copyright[] =
 	The Regents of the University of California.  All rights reserved.\n";
 #endif /* not lint */
 
-#ifndef lint
 #if 0
+#ifndef lint
 static char sccsid[] = "@(#)msgs.c	8.2 (Berkeley) 4/28/95";
-#endif
 #endif /* not lint */
+#endif
 
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
@@ -151,7 +151,6 @@ bool	clean = NO;
 bool	lastcmd = NO;
 jmp_buf	tstpbuf;
 
-
 void	ask(const char *);
 void	gfrsub(FILE *);
 int	linecnt(FILE *);
@@ -544,6 +543,7 @@ int argc; char *argv[];
 			case 'X':
 				exit(0);
 				/* NOTREACHED */
+
 			case 'q':
 				/* FALLTHROUGH */
 			case 'Q':
@@ -551,6 +551,7 @@ int argc; char *argv[];
 				printf("--Postponed--\n");
 				exit(0);
 				/* NOTREACHED */
+
 			case 'n':
 				/* FALLTHROUGH */
 			case 'N':