now Redis is C99-ok

Makefile

@@ -3,7 +3,7 @@
 # This file is released under the BSD license, see the COPYING file
 
 DEBUG?= -g
-CFLAGS?= -O2 -Wall -W -DSDS_ABORT_ON_OOM
+CFLAGS?= -std=c99 -pedantic -O2 -Wall -W -DSDS_ABORT_ON_OOM
 CCOPT= $(CFLAGS)
 
 OBJ = adlist.o ae.o anet.o dict.o redis.o sds.o zmalloc.o

sds.h

@@ -38,7 +38,7 @@ typedef char *sds;
 struct sdshdr {
     long len;
     long free;
-    char buf[0];
+    char buf[];
 };
 
 sds sdsnewlen(const void *init, size_t initlen);