Don't initialize globals to zero (or NULL)

Some compilers and linkers aren't smart enough to optimize this,
as global variables are implictly initialized to zero.  As a
result, binaries are a bit smaller as more goes in the .bss and
less in the text section.

git-svn-id: https://svn.musicpd.org/mpd/trunk@5254 09075e82-0dd4-0310-85a5-a0d7c8717e4f

src/state_file.c

@@ -41,7 +41,7 @@ static struct _sf_cb {
 	{ readPlaylistState, savePlaylistState },
 };
 
-static const char *sfpath = NULL;
+static const char *sfpath;
 
 static void get_state_file_path(void)
 {