Revert "Replace zero-length array decls with []."

This reverts 6c5f9baa3bc0d63e141e0afc23110205379905a4 commit, whose
change breaks gcc-2.95.

Not that I ignore portability to compilers that are properly C99, but
keeping compilation with GCC working is more important, at least for
now.  We would probably end up declaring with "name[1]" and teach the
allocator to subtract one if we really aimed for portability, but that
is left for later rounds.

Signed-off-by: Junio C Hamano <junkio@cox.net>
diff --git a/cache.h b/cache.h
index d407f39..0dcd2fe 100644
--- a/cache.h
+++ b/cache.h
@@ -104,7 +104,7 @@
 	unsigned int ce_size;
 	unsigned char sha1[20];
 	unsigned short ce_flags;
-	char name[];
+	char name[0];
 };
 
 #define CE_NAMEMASK  (0x0fff)
@@ -287,7 +287,7 @@
 extern struct alternate_object_database {
 	struct alternate_object_database *next;
 	char *name;
-	char base[]; /* more */
+	char base[0]; /* more */
 } *alt_odb_list;
 extern void prepare_alt_odb(void);
 
@@ -300,7 +300,7 @@
 	unsigned int pack_last_used;
 	unsigned int pack_use_cnt;
 	unsigned char sha1[20];
-	char pack_name[]; /* something like ".git/objects/pack/xxxxx.pack" */
+	char pack_name[0]; /* something like ".git/objects/pack/xxxxx.pack" */
 } *packed_git;
 
 struct pack_entry {
@@ -315,7 +315,7 @@
 	unsigned char new_sha1[20];
 	unsigned char force;
 	struct ref *peer_ref; /* when renaming */
-	char name[];
+	char name[0];
 };
 
 extern int git_connect(int fd[2], char *url, const char *prog);