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/tagTracker.c

@@ -26,15 +26,7 @@
 #include <assert.h>
 #include <stdlib.h>
 
-static Tree *tagTrees[TAG_NUM_OF_ITEM_TYPES] = {
-	NULL,
-	NULL,
-	NULL,
-	NULL,
-	NULL,
-	NULL,
-	NULL
-};
+static Tree *tagTrees[TAG_NUM_OF_ITEM_TYPES];
 
 typedef struct tagTrackerItem {
 	int count;