export FATAL() with noreturn attribute

This attribute was set in log.c, but not exported to other
modules in log.h

This allows us to remove some unneccessary variable
initializations that were added in r6277.  I did
audioOutput_shout.c a bit differently, to avoid some
jumps.

before:
$ size src/mpd
text    data     bss     dec     hex filename
225546    4040   14600  244186   3b9da src/mpd

after:
$ size src/mpd
text    data     bss     dec     hex filename
224698    4040   14600  243338   3b68a src/mpd

git-svn-id: https://svn.musicpd.org/mpd/trunk@6821 09075e82-0dd4-0310-85a5-a0d7c8717e4f

src/state_file.c

@@ -106,6 +106,5 @@ void read_state_file(void)
 void mpd_noreturn state_file_fatal(void)
 {
 	FATAL("error parsing state file \"%s\"\n", sfpath);
-	exit(EXIT_FAILURE);
 }